72 Transactions of the American Institute. 



entered by Messrs. Bulkley and Lynde be used, if possible, for this 

 purpose, and that they thus be tested. 



Each exhibitor will see that his boiler is ready for the test, his 

 steam pipe well covered, and valves in good order. He will, before 

 his boiler is connected for test, hand to the Committee, through the 

 Superintendent of Machinery, a statement of the amount of heating 

 and of grate surface in his boiler, and a further statement, that he has 

 read this letter of instructions, taken a copy, and that he is ready to 

 go on with the test as herein proposed. 



Any exceptions taken to the proposed test, or any detail thereof, 

 must be forwarded to the Committee in writing, previous to entering 

 upon the test. Any exceptions taken to the action of one exhibitor 

 by another, or to the decision of the Judges during the trial, will be 

 presented promptly in writing. 



It is to be understood that the proposed test is made for the pur- 

 pose of enabling the Committee of Judges to make up their report to 

 the Managers, as required by regulation, with intelligence and confi- 

 dence. 



In conducting the test, you and your assistant are authorized to 

 superintend and to keep the log, with the aid of such other assistants 

 as the Committee may appoint. 



The trials will be of twelve hours each ; and the boilers will be 

 tested successively in an order that will be determined by lot. 



Fires will be started at nine (9) o'clock in the morning with dry 

 wood, of which you will see a good supply on hand ; and at the 

 moment when steam issues freely from the safety-valve of the boiler, 

 the test will be considered as commenced, and the fuel will be taken 

 from the coal pile. ]STo more wood will be used. 



The coal will be weighed in buckets, carefully counterweighted on 

 the scale, and always filled to the same weight precisely. The scales 

 are to be tested and officially sealed before the trial. 



The ashes will be weighed dry in a similar manner. 



The dampers will be fixed wide open, unless it should become evi- 

 dent that the boiler "primes" or "foams" seriously in consequence. 



Each half hour there will be noted in the log the time, height of 

 barometer, steam pressure (from the same gauge in all tests), weight of 

 coal used, weight of ashes removed, temperature of external atmos- 

 phere, of the feed water, water of condensation, steam in boiler^ steam 

 pipe, condensing water before and after leaving condenser tank, gases 

 in flues, four feet, as nearly as is possible, from nearest heating surface, 

 the volume of water of condensation, and the -reading of the meters. 



