Rubber Hand Stamps and the Manipulation of Rubber A practical treatise on the manufacture of India rubber hand stamps, small articles of India rubber, the hektograph, special inks, cements, and allied subjects

CHAPTER II.

Chapter 222 wordsPublic domain

THE NATURAL HISTORY AND COLLECTION OF INDIA RUBBER.

African, East Indian, Central and South American Gums--Different Methods of Collection and Coagulation 15