Welcome to an enchanted land ruled by unicorn princesses! Cressida Jenkins, a unicorn-obsessed girl who is sure that unicorns are real, is invited to visit, and readers will be thrilled to journey to the Rainbow Realm along with her! In each story, Cressida is called to help a unicorn princess and her sisters in a magical adventure. In Prism's Paint, Ernest the blundering wizard-lizard casts a spell that accidentally alters Princess Prism's power--instead of being able to turn objects different colors, she now makes them clear! The only way to reverse the spell is to find the missing rainbow of the Valley of Light, and the unicorn princesses know who can help them: Cressida! But will Cressida be able to find the rainbow and restore Prism's powers? This sweet series is full of sparkle, fun, and friendship.

Carried out over a period of ten years, this is a listing of scientific instruments dating before 1920, preserved in many collections throughout the island of Ireland. It gives location, date, and description for each of the more than 5,000 entries, together, where appropriate, with relevant accompanying detail. It demonstrates clearly that Ireland has an important resource which hitherto had not been appreciated. It also preserves information about collections which have since been lost, sold, or otherwise dispersed.

"Letters to the Editor" issued as Part 2 and separately paged from v. 148, 1967.

The basic principles are explained with examples from student's daily life situations and every topic is followed by thought-provoking questions. Relevant illustrations have been given, wherever necessary. The language used is simple and lucid which keeps the interest of the students alive till the end of the topic.