Gas and fuel analysis for engineers A compend for those interested in the economical application of fuel Prepared especially for the use of students at the Massachusetts institute of technology . washer P, Fig. 16, is in goodcondition. Unless its upper surfaceis fairly smooth the cover cannot betightly closed. Repeated screwingon of the cover raises a burr of this becomes noticeable it mustbe removed by cutting with a knife-blade. If there is difficulty in mak-ing the cover tight, it is most likelyto be due to this cause. Grease the. screw 5 upon the out-side of the bomb slightly wit
Gas and fuel analysis for engineers A compend for those interested in the economical application of fuel Prepared especially for the use of students at the Massachusetts institute of technology . washer P, Fig. 16, is in goodcondition. Unless its upper surfaceis fairly smooth the cover cannot betightly closed. Repeated screwingon of the cover raises a burr of this becomes noticeable it mustbe removed by cutting with a knife-blade. If there is difficulty in mak-ing the cover tight, it is most likelyto be due to this cause. Grease the. screw 5 upon the out-side of the bomb slightly with tallowor a heavy oil, but be sure that noneof the grease gets beyond the leadwasher. Secure the bomb very firmly in theheavy clamp on the the top on a ring or in a clamp of a lamp-standand in an upright position. Put in position the platinum tray C and the rod E,Fig. 17. Twist on the loop of ignition-wire (fine platinumor iron). This must make good electrical contactwith both E and the pan or its supporting this the current will not flow to fuse the to ignite is almost always traceable to thiscause. Pour into the tray a known weight of the substance. Fig. 16—MahlersBomb. 84 GAS AND FUEL ANALYSIS. to be burned. If this be coal, slightly over one gramshould be used. It is usually best inserted from asmall test-tube weighed before and after, with dueprecautions against loss. The ignition-wire should dip well into the coal. The fineness required in the combustible depends
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