LABORATORY MANIPULATION 29 



student should throw burned matches and splinters into 

 the receptacles provided for the purpose. 



33. Care of Sinks and Plumbing. Do not throw waste 

 matter of any description, as paper* glass, matches, etc., 

 into the sinks. Large waste jars, for such materials, are 

 provided under every sink and elsewhere. Everything 

 liable to clog the drains must be thrown into these jars. 

 Liquids containing acids may be safely thrown into the 

 sinks, provided a stream of water is kept running at the 

 same time to dilute and wash out the acids. When acids 

 are poured into the sinks, care should be taken to prevent 

 spattering of the liquid, as severe burns are sometimes 

 received when the liquid is not properly poured from the 

 vessel. If directions are followed no accidents can occur. 

 Do not fill the sinks too full. The water should never be 

 allowed to come to within 2 inches of the top of the 

 sinks. If the sinks overflow they cause much damage to 

 the rooms below. Students who disregard the regula- 

 tions in regard to plumbing and the use of sinks, will be 

 held responsible and must pay for any damage caused by 

 carelessness or negligence. 



34. How to Accomplish the Best Results in the Lab- 

 oratory. In order to accomplish the best results, the 

 student, while in the laboratory, should endeavor to use 

 his time profitably and economically. He should obtain 

 a clear idea of what he is to do, and then do it to the best 

 of his ability. If the experiment is not a success, repeat 

 the work. Never pass over an experiment that offers 

 difficulties in performing. Much valuable time can be 

 saved by a brief study of the day's work before going 



