The chemistry of plant and animal life . 24 AGRICULTURAL CHEMISTRY. The small balance used for weighing materials in theseexperiments is shown in Fig. 5. In case 5 grams of amaterial are to be weighed, prepare counterpoised papers,about 3 by 4 inches in size ; thatis, tvAo pieces of paper of exactlythe same size to be placed on op-posite sides of the balance. Ifthey do not weigh alike, removesmall pieces of paper from theheavier pan, until the needlemoves nearly as many divisionson one side of the scale as on theother. Then place, with the for-ceps, the 5 gram weight on —Balance. right
The chemistry of plant and animal life . 24 AGRICULTURAL CHEMISTRY. The small balance used for weighing materials in theseexperiments is shown in Fig. 5. In case 5 grams of amaterial are to be weighed, prepare counterpoised papers,about 3 by 4 inches in size ; thatis, tvAo pieces of paper of exactlythe same size to be placed on op-posite sides of the balance. Ifthey do not weigh alike, removesmall pieces of paper from theheavier pan, until the needlemoves nearly as many divisionson one side of the scale as on theother. Then place, with the for-ceps, the 5 gram weight on —Balance. right-hand pan of the balance. Do not handle the weights with the fingers. By means ofthe scoop or spoon provided for the purpose, add to thepaper in the left-hand pan of the balance, enough of thematerial that is to be weighed to counterpoise the 5-gramweight. If any of the substance has been spilled it shouldbe cleaned up at once. The weight should be replaced inthe tveight box and the forceps returned to their proper the weights are lost, a charge is mad
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