REPORT 



Of the coirimitico ap;iniiite<l (o pxnminp tlio G is Works 

 o! tlio ■Maiiliattaii Gas higUt Coiripai>y. 



The large new tank hnnse is 188 feet in length, and 92 feet in 

 •width, and 47 feet in height. The roof has a span of 92 feet. The 

 tie beams are prevented from sinking by a longitudinal diamond 

 shaped truj^. This buihling contains two tanks, each 84| feet in 

 diameter, and 20 feet deep, and each capable of holding 860,000 

 gallons. The iron gas holder nearly finished, is 83 feet in diameter, 

 and 41 feet in height, and will contain 216,000 cubic feet of gas ; 

 this is called a telescope gasometer, from being made in two parts, 

 the upper part or joint being of a less diameter than the lower joint, 

 and arranged with a cup at the bottom rim, into which fits a corres- 

 ponding cup inverted on the upper lim of the lower joint. Upon 

 the gas holdeis being filled, the upper joint first rises, and as it 

 emerges from the water of the tank, the cup at the bottom rim rises 

 filled with water, hooks into the inverted cup of the lower joint, and 

 in this way makes a water-sealed joint. The advantage of this kind 

 of gasometer is, that capacity is gained by heighth, instead of dia- 

 meter, an object of importance where the ground is very valuable. 



The lightness of the gas holder requires but small counter balances. 

 It is so well adjusted that its own weight affords neai ly the requisite 

 regular pressuie to the tfHuent gas to obtain a good light at the 

 burneis. 



The retort house,, which was next submitted to the examination of 

 the comuiittee, by Mr. David C. Coldin, the president ofthecom[)a- 

 ny, is 97 feel long, and 51| wide, and is to be covered with an iron 

 rcof. a I art of which is nearly completed. The construction of this 

 roof shovvs much aitistieal skill in the general dispo>ilion of its com- 

 ponent parts, giving great btrtngth, lightnesj and du ability. The 



