. An introductory course of lessons and exercises in chemistry (rewritten 1919). ^WWWWWA Rheostat. Trough Chapter VII 77 oO of water—thus securing a half-saturated solution—and pour these100 of solution into the trough. Secure an ammeter of the total ca-pacity of about one to two amperes; secure a voltmeter with a capacityof ten to fifteen volts; secure a source of direct electric current with avoltage of about ten volts (e. g,, 6-8 dry cells) ; and secure a rheostat ofabout 30 ohms resistance and a current capacity of at least one up the apparatus and the trough as sh
. An introductory course of lessons and exercises in chemistry (rewritten 1919). ^WWWWWA Rheostat. Trough Chapter VII 77 oO of water—thus securing a half-saturated solution—and pour these100 of solution into the trough. Secure an ammeter of the total ca-pacity of about one to two amperes; secure a voltmeter with a capacityof ten to fifteen volts; secure a source of direct electric current with avoltage of about ten volts (e. g,, 6-8 dry cells) ; and secure a rheostat ofabout 30 ohms resistance and a current capacity of at least one up the apparatus and the trough as shown in accompanying figure,(c) Operation.—Turn on the current and adjust it with the rheostatuntil a current of about amps, is passing. Note accurately bothammeter and voltmeter readings which are then shown by the instru-ments. In the following operations adjust the current so as to keep thevoltage constant (at the value which has just been noted), and record inparallel columns the amount of the current that flows after each dilutionof the solution. Dilute the solution by adding
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectchemistry, bookyear19
