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The Yonkerman Company Collection

Identifier: RH-A-3571

Scope and Contents

The collection amounts to .05 cubic feet and is composed of primarily one book published in Kalamazoo in 1912 titled, Tuberculosis by Freeman Hall, M.D. and published by the Yonkerman Company. The book is approximately 5 ½”x7 ½”x ¼” with a green cover and gold writing. In addition there is an appendix which is the same size along with a packing envelope for the book. The book is filled with a typed text on cream paper along with seven color plates. The appendix is on a different type of paper. The packing envelope is on brown lightweight cardboard and 5 ½”x7 ½” and is open on both ends. Both the book and appendix fits in the envelope. There is an eight cent postage stamp in the right hand corner along with a postmark from Kalamazoo on the stamp. The envelope is addressed to a Sammuel Finch in Denbeigh, North Dakota. The left hand side has a statement that if the package cannot be delivered it should be returned to the 100 Shakespeare Building in Kalamazoo, Michigan.


  • Publication: 1912


Conditions Governing Access

No restrictions

Biographical / Historical

Born in Kalamazoo, Derek Yonkerman (1859-1923) moved to Cleveland with his family seven years later. He eventually became a veterinarian, returning to Kalamazoo in 1890 to practice. Eleven years later, an article in the Kalamazoo Gazette reported that Yonkerman had a cure for tuberculosis in cattle which he hoped to market for humans. In 1902, the Yonkerman Chemical Company organized with Yonkerman as President and William Shakespeare as Secretary-Treasurer. The company, located in the Lawrence and Chapin building on North Rose Street, produced Tuberculozyne touted to be a cure for tuberculosis. His first book called Tuberculozyne A Cure for Consumption came out in 1905. The book in this collection, Tuberculosis was written by Dr. Freeman Hall (1834-1918) a Civil War surgeon who came to Kalamazoo in 1883. About three-quarters of the book covers what the disease is with the rest promoting Tuberculozyne. The appendix gives glowing recommendations from those who have tried the product and were now cured or improved. Newspapers advertised the book which could be acquired for free. Tuberculozyne was primarily glycerine, water, burnt sugar and almond oil. It cost $10.00 per bottle and was marketed in other countries like Great Britain and Australia. The Yonkerman Company ceased to exist after 1916. Dr. Yonkerman continued to practice as a veterinarian until his death in 1923.


0.05 Cubic Feet

Language of Materials



The collection is composed of a book titled Tuberculosis by Dr. Freeman Hall published in 1912 along with an appendix and a packing envelope.


The items are in fairly good shape. The cover and spine of the book have spots of discoloration which may have been caused by a substance getting on the book. There is no evidence of mold or mildew. There is some discoloration which may have been caused by water at the bottom of the pages in about half of the book. The appendix has some discoloration on the front and back covers but there is no evidence of mold or mildew. The brown envelope has holes at the bottom and the top and is discolored with stains possibly caused by moisture.

The Yonkerman Company Collection Finding Aid
Lynn Houghton
Description rules
Describing Archives: A Content Standard
Language of description
Script of description

Repository Details

Part of the Western Michigan University Archives & Regional History Collections Repository

Charles C. and Lynn L. Zhang Legacy Collections Center
1650 Oakland Drive
Kalamazoo MI 49008-5307 US
(269) 387-8490