174 Mode of Heating Rooms ly Steam. 



strong. Indeed, the memorialist was immediately sensible 

 that their position was unfavourable. With a view to some 

 conveniences in point of room, they had been carried up 

 diagonally in one end of the mill, whence the upper sides 

 of the pipes became sooner heated than the lower ; which 

 caused an unequal expansion. The water arising from the 

 sseam condensed in the pipes in its return to the boiler, and 

 also obstructed the steam in its ascent. In order to remedy 

 these defects, the pipes were altered, and erected in a perpen- 

 dicular position, and certain tubes were connected with them 

 to carry off the water arising from condensation. The whole 

 apparatus, as it stood after this alteration, is represented by 

 the drawing, fig. 1 . 



This drawing presents a view of an inner gable, which is 

 at one extremity of the preparation and spinning-rooms of 

 the mill. On the other side of this gable there is a space 

 of 1 7 feet, enclosed by an outer gable, and containing the 

 water-wheel, the staircase, and small rooms for the accom- 

 modation of the work. In this space the furnace and boiler 

 are placed on the ground. The boiler cannot be shown here, 

 as it lies behind the gable exhibited ; nor is it of any con- 

 sequence, as there is nothing peculiar in it. It may be of 

 any convenient form. The feeding apparatus, &c. are in 

 every respect the same as in tlie boiler of a conunon steam^ 

 engine. A circular copper boiler, two feet diameter by two 

 feet deep, containing 30 gallons of water, with a larjie cop- 

 per head as a reservoir for the steam, was found to answer 

 in the present instance. The steam is conveyed from the 

 boiler through the gable, by the copper pipe B, into the tin 

 pipe C, C. From C it passes into the centres of the per- 

 pendicular pipes E, E, E, by' the small bent copper tubes 

 D,D,D. The pipes E, E, E, are connected under the garret 

 floor by the tubes F, ¥, for the more easy circulation of the 

 steam. The middle pipe, E, is carried through the garret 

 floor, and communicates with a lying pipe, 36 feet in length 

 (the end of which is seen at G), for heating the garret. At 

 the further extremity of the pipe G, there is a valve falling 

 inwards to prevt;iit a vacuum being fornicd on the cooling 

 of thi apparatus ; the cousequ'^ric!", of wtiich would be the 



crushing; 



