Excerpt from Transactions of the American Institute of Chemical Engineers, 1911, Vol. 4 The president: The first number on the program is an address of welcome on behalf of the Mayor of the City of Chicago by Mr. Edward F. Wade. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Transactions of the American Institute of Chemical Engineers, 1908, Vol. 1 The committee will appreciate an early reply and a full state ment of your views on the questions asked and any other pertinent suggestions which you may wish to offer. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Transactions of the American Institute of Chemical Engineers, Vol. 14: 1921-22 Sulphuric acid is universally concentrated by the application of heat. The first interest of the designer of apparatus to concentrate sulphuric acid must hence lie in the thermal properties of sulphuric acid. Several articles have been written on this subject, and one of them at least has treated the subject very thoroughly and comprehensively. The results, however, are not most conveniently expressed, and the original article is not particularly accessible. This, then, must be the excuse for the present attempt to present an old subject from a different viewpoint. The first thermal property of sulphuric acid which interests us is its specific heat. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Transactions of the American Institute of Chemical Engineers, 1909, Vol. 2 The program which we have before us calls first for an address of welcome from Comptroller Herman A. Metz. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Transactions of the American Institute of Chemical Engineers, Vol. 9: 1916 When by unforeseen circumstances a nation is suddenly plunged into conditions depriving it of materials necessary for its welfare, it becomes an eminent duty of such a people to take immediate steps to attempt to restore the supply of the wanting essentials. Since history ever repeats itself, the assumption can at once be made that such conditions must have been taken under advisement long before there was any evidence of their becoming actualities, but the presumable optimistic trait in human nature and without which we would not be able to live through a happy existence, will procrastinate the evil day, with the intention of relying on the strength of the country when the necessity arises. Recent events, however, have proved that this is no easy matter and the effort made in this direction, by making an inventory of our supplies, brings us to face the question of crude material, a question which is of the utmost importance in order that our stocks may be sustained. The United States is a country of immense resources, but owing to territorial advantages or seasonal conditions, it follows that some of the basic needs are entirely wanting or so limited that they may be considered a negligible quantity. No matter if we are surrounded by a high protective duty or laboring under a tariff for revenue simply, at least that in name, which obviously means nothing at all, instances will always remain where desirable commodities are lacking. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Transactions of the American Institute of Chemical Engineering, Vol. 10: 1917 When we speak of resources we usually have in mind material things, such as financial resources, mineral resources, agricultural resources, etc. It would appear, however, that this is a rather limited construction of the meaning of the word "resources," for with all of these material resources there is the presupposition that one has the ability to use them. Wealth owned by an idiot may not be to him a resource, but rather a liability. A mining deposit that no one knows how to work is hardly worth calling a resource. Wonderfully fertile fields in the center of Africa are not resources, to the extent that they are removed from the intelligent use of civilized men. In our own country it is true that wealth, mineral deposits, and fertile fields are resources, but they are such because there are resourceful men in our country who can use them. If the present war teaches us anything, it is this: In these days wars cannot be won because a nation has great material resources only, but rather because a nation has resourceful men. Let us consider this carefully and see whether what I have said is true and what, if it is true, it implies. Mexico is a country that is wonderfully rich in possibilities. Unfortunately for Mexico, whatever the cause may be, the Mexicans have not, themselves, so far developed their possible resources to their country's full advantage. In so far as these resources have been well developed, it has been because resourceful men have gone to Mexico and endeavored to turn mineral and agricultural resources to profitable ends. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Transactions of the American Institute of Chemical Engineering, 1914, Vol. 7 Chemical engineering as an organized profession is comparatively new, although many men have been engaged in this class Of work since the beginning of large-scale manufacture. Since the organiza tion Of this Institute, various definitions have been given to outline the scope of our professional activities, many schemes have been suggested to improve the training of our apprentices, some advances have been made towards standardization in our engineering practice, a code defining the ethical standards of our profession has been formulated and adopted, and we have shown our aims, with some results, in constructive patent reform. Work of such a character is of the greatest importance, and is far in advance of that heretofore undertaken by any other organization in our field. It can never be regarded as completed, and the best thought and effort Of well constituted committees will continue to be given to advancement along these lines, with great resultant benefit to the profession. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Transactions of the American Institute of Chemical Engineers, 1912, Vol. 5 If we first produce the pure crystalline phenol-alcohol, contain ing no excess of phenol, for instance crystalline saligenin or oxybenzyl-alcohol, and if we heat it gently, it will simply dehydrate and be transformed in a fusible mass which on cooling, solidifies to a resinous product - a fusible saliretin resin. The latter, submitted to the further action of heat, polymerizes and becomes an infusible, insoluble saliretin. This polymerization is facilitated, by the pres ence of small amounts of catalyzers, for instance, hydrochloric acid. The presence of an excess of phenol retards polymerization; hence the infusibility induced by polymerization will be retarded, and this, until some way or another the excess of phenol has been expelled. The infusible polymerized saliretin Obtained by heating phenol-alcohols containing no free phenol, or by heating fusible saliretin containing no free phenol, is insoluble in alcohol, but swells in acetone; it softens decidedly on heating, although it is no longer fusible. Longer heating does not harden it further, nor make it more resistive. It is harder, stronger, and more resistant to physical and chemical agents than the fusible saliretin from which it is derived; in this respect, it surpasses even more the soluble fusible resins described by Blumer, delaire, Baekeland, and called phenol resin by Aylesworth.17 But even after polymerization or hardening has been carried as far as possible, it is considerably less hard and less strong and less resistant to physical and chemical agents than the polymerization products resulting from the reaction of phenol on a sufficiently large proportion of formaldehyde or equivalent substances. In order to obtain the latter polymerization products of maxi mum strength. Hardness, and maximum resistivity. An adequately larger amount of methylen group must be introduced before or dur ing the act of polymerization. The introduction of this methylen group may be accomplished by at least three distinct methods. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Excerpt from Journal of the Chemical Society, 1911, Vol. 99: Transactions; Part II More recently, however, Browning and Flint (amer. J. Sci, 1909, [iv], 28, 347) asserted that if tellurium tetrachloride, dissolved in hydrochloric acid, is precipitated by a large excess of hot water, some separation of the element is effected. The work was continued by Flint (amer. J. Sci, 1910, [iv], 30, A large quantity of tellurium was purified by precipitation with sulphur dioxide, fusion of the precipitate with potassium cyanide, decomposition of the potassium telluride by air, and distillation of the product in a current of hydrogen. About 1000 grams of this material were converted into the dioxide, and dissolved in the minimum quantity of hydrochloric acid. This was poured into a large excess of boiling water, and allowed to remain. The dioxide which separated was again dissolved in hydrochloric acid, and precipitated by hot water. When this process had been repeated four times, atomic-weight determinations were made with the material, and gave a mean result of and after ten repetitions of the same process the atomic weight obtained was only No atomic weight determinations are given in the paper of the less hydrolysable material. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.