An essay on the history of electrotherapy and diagnosis; . wereobtained by this apparatus. The modern make and break used in small coils is the wellknown Neefs hammer, invented by Dr. Neef, of connection with this name we may notice, in Golding-Birds Lectures, a drawing of a coil fitted with a hammer contactbreaker which, from the wording, one would imagine wasinvented as well as made by Neeves, an instrument maker ofLondon. As this point is interesting the authors own wordsmay be quoted: As we have seen that in all such contrivances(, induction coils) a small voltaic current
An essay on the history of electrotherapy and diagnosis; . wereobtained by this apparatus. The modern make and break used in small coils is the wellknown Neefs hammer, invented by Dr. Neef, of connection with this name we may notice, in Golding-Birds Lectures, a drawing of a coil fitted with a hammer contactbreaker which, from the wording, one would imagine wasinvented as well as made by Neeves, an instrument maker ofLondon. As this point is interesting the authors own wordsmay be quoted: As we have seen that in all such contrivances(, induction coils) a small voltaic current furnishes theinitial force, it is important to have this completely undercommand, and to be able to make and break contact with the HISTORY OF ELECTROTHERAPY 63 inducing apparatus with the utmost facility and may break contact with the battery, if you please, bymeans of a rachet or cog-wheel ; but this is often inconvenient,as it renders the service of an assistant necessary. On thisaccount an automatic apparatus is always to be preferred. I. Automatic contact breaker. Made by Neeves. (Golding-Bird,Lectures, 1849.) believe I proposed the first of these several years ago, in theAnnals of Philosopliv ; but this as well as all others 1 haveseen is much inferior to one constructed by a ingeniousphilosophical instrument maker, Mr. Neeves, of Broad Street,
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