Several of the instruments to be described have been used by me for a long time, but I have never presented them for publication. While none of them are of any unusual scientific value, they have proved themselves practical to me.
TASTE AND SMELL TESTER
A device for testing the senses of taste and smell of a patient can be constructed at home. It utilizes ten essential substances that are used in everyday life by the usual patient. It consists of a wooden box 12.5 cm. long, 6.5 cm. wide and 5.5 cm. high (fig. 1). Ten holes are bored into it, and in each hole is placed a small glass vial; each vial is labeled and contains an essential solution. The fluids used are as follows: for testing the taste, (1) sugar solution, (2) oil of sweet orange, (3) salt solution, (4) solution of pepper and (5) vinegar; for