File:Brooklyn medical journal. (1892) (14597276869).jpg

Identifier: brooklynmedicalj6189medi (find matches)
Title: Brooklyn medical journal.
Year: 1892 (1890s)
Authors: Medical Society of the County of Kings (Kings County, N.Y.)
Subjects: Medicine Surgery Medicine
Publisher: Brooklyn, N.Y. : Medical Society of Co. of Kings
Contributing Library: Columbia University Libraries
Digitizing Sponsor: National Endowment for the Humanities (NEH)

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condition must be used daily, must be recharged as often as used,and its charge must never be more than one-third exhausted. It isadvisable, therefore, to make the portable storage battery do duty also 448 CHARLES JEWETT, A.M., M.D. for office purposes. Most of the annoyance which attaches to theuse of storage batteries that require to be sent outsat short intervalsto be recharged may be obviated when the charging current can behad on tap in the office. If the battery is kept well charged, andthe charging current allowed to run through it daily, very littleadditional attention will be needed to keep it at all times in perfectworking order. For charging, the positive terminal of the chargingwire must be connected with the positive pole of the battery, andthe negative with the negative pole. Moreover, the volume of the
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Fig. 9. charging current must be regulated according to the size orcapacity of the battery. It may be just enough so that the fluiddoes not boil perceptibly. The battery will be injured or destroyedif these precautions are not observed. A safe charging rate is threeamperes for every square foot of anode surface in the batteryplates. A more convenient rule, however, is about one ampere forevery twenty ampere-hours of battery capacity. For the usualmedical battery a half ampere current answers sufficiently well. Asimple and economical method of charging is shown in Fig. 7. Thebattery is connected by a loop with a single 16 c.p. lamp circuit,which is used for ordinary illumination. When the lamp is turned THE APPLICATIOX OF THE ELECTRIC LIGHT CURRENT. 449 on the battery is being charged. Frequent charging and the main-tenance of a full charge are thus secured without special attention. A search-lamp may be operated by the storage battery or by con-necting it with the terminals of the cau

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