A reflex hammer, combined in one instrument with appliances for the more usual neurologic examination and yet sufficiently compact so as not to be bulky, has been found so useful that a description of it is offered.
The hammer is collapsible and can be carried in one's waistcoat pocket. It is well balanced so as to permit delicate gradations essential to proper determination of the reflexes, and includes measures for testing tactile sensation, pain, the two point test and the superficial reflexes, such as the abdominal, cremasteric and Babinski. The principle of the algesimeter of Casamajor and Strong, namely, a piece of flexible spring steel mounted with a pin, is adopted, permitting stimuli of any desired strength to be used. Only by the use of stimuli of like strength can accurate comparative examinations be made. Unscrewing A at 2 and lowering B exposes the needle, F (Fig. 3). When pressure