Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
Due to the decrease in the horse population the equipment of the general practitioner has been modified during the last 2 decades. Formerly the veterinary clinics in cities were for the dray horses used by local transportation companies; now the clinics are almost entirely for small animals. As a result, the large animal operating table has become estranged from most veterinarian's equipment.
Treman, H. B. and Kingrey, B. W.
"Surgery in the Field,"
Iowa State University Veterinarian: Vol. 6
, Article 7.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol6/iss2/7