. American chemical journal . xperience has shown us that the good conduct of a mem-brane depends very much upon the maintenance of a con-stant temperature from the time of its deposition to the endof the measurement of pressure. On that account, it hasbeen our practice to deposit or repair the membrane at thetemperature at which the measurement is to be made, andthereafter to maintain the cell at that temperature until theexperiment is finished. Again, if the solution is expandedby holding the cell in the warm hand, and, while it is in thatcondition, the cell is closed—fixing its capacity—the
. American chemical journal . xperience has shown us that the good conduct of a mem-brane depends very much upon the maintenance of a con-stant temperature from the time of its deposition to the endof the measurement of pressure. On that account, it hasbeen our practice to deposit or repair the membrane at thetemperature at which the measurement is to be made, andthereafter to maintain the cell at that temperature until theexperiment is finished. Again, if the solution is expandedby holding the cell in the warm hand, and, while it is in thatcondition, the cell is closed—fixing its capacity—the subse-quent fall in temperature in the bath is attended by a dilutionof the solution. The custom of wrapping the cell in non-conducting material and of wearing a glove upon the handwhich holds it, or of frequently dipping the hand in coldwater, is an uncertain remedy for the difiiculties which have Cells for Measurement of Osmotic Pressure. 273 been enumerated; the true remedy is a cell which can be morequickly closed. 3.
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Keywords: ., bookcentury1800, bookdecade1870, bookidamericanchem, bookyear1879
