86 NAVAL SCIENCES. 



end, of which the upper ones are connected with the bearers of the axle, 

 while the lower ones rest on firm supports on the floor. In this way the 

 axle is made to admit, to a certain extent, of alterations in the construction 

 of the vessel. The two inside pillars are connected by the piece P", and the 

 inside bearers of the axle by the braces, P'", while between the ship's 

 beams, adjacent to the engine, braces, p", are inserted with the disks, i\ 

 The supply of steam in the cylinder, A, is effected by means of the regulat- 

 ing cylinder, B and B', into which the steam passes through the pipe, a", 

 with the valve, a. The connexion between the regulating cyliriders and 

 the cylinder, A, is shown in pi. 18, fig. 2, in the direction of the transverse 

 line 1-2, in fig. 3 ; and in the direction of the transverse line 3-4, in 

 fig. 2. The regulating cylinders have sliding valves, of which the details 

 may be seen in figs. 4, 5, and 6, the valve-rod, c, being connected with 

 the regulating apparatus of the whole engine. This apparatus is con- 

 structed as follows : On the axle, O, is placed the eccentric, Q,^, from which 

 the sliding-rod, Q", extends to the crank-bearing, i ; this bearing supports 

 on its axis the lever, k, which is joined by the connecting-rod, /, to the 

 angular lever, mn ; this turns on the gudgeon, n\ raising and lowering the 

 valve-rod, c, at a calculated rate of velocity ; the range of this movement is 

 determined by the situation of the arrangement i'i'i'". An additional slid- 

 ing lever, k', is placed on the crank-axle, k, the different positions of which 

 are shown in^^. 7 a, Sind fig. 7 b. This lever moves the sliding rod, I , and by 

 means of this and the leverage, o' V I" k"' j" k' I" j ", the steam is brought 

 into the condenser, E, and its admission regulated ; the cold water is injected 

 by the pump, Z, the supply-pipe of which is U, and the piston-rod, V, con- 

 nected with the working-beam, L ; the admission of the water is regulated 

 by the apparatus, L'; the pipe, D', conducts the water into the condensing- 

 trough, D ; the injection is regulated by a valve, which can be regulated on 

 the disk, D'"; the condensed water is raised to S by the hot- water pump, E, the 

 piston-rod of which is moved by the lever, g', of the working-beam, L, and 

 returns through S' and S^^ to the boiler. Fig. 13 represents a self-acting 

 exhausting apparatus in section, and^^. 14 in outline )figs. 11, 12, 15, details 

 of the stop-cocks. A is the chamber, with the two valves, a, b, which act 

 on the pipes, C and B; of these, <z is a hand-valve and b the self-acting 

 valve. Both valve-rods pass air-tight into stuffing-boxes on the upper part 

 of the chest. D and B' are water-pipes, and E the stop-cock. On the 

 valve-rod of 6 is a ring, connecting it with the two-armed lever, G, which 

 turns on /; g is a weight, which balances the ball, S'. As soon as the air 

 is rarefied in H, the piston, h\ falls in the pipe ; the weight, g, is raised at 

 the same time with the valve, b, and the exhaustion is effected ; jj is a pipe 

 communicating with the supply-pipe, h, and the atmosphere. 



PL 19, fig. 1, represents a longitudinal section, and pi. IS, fig. 10, a side 

 view of the engine of 450 horse-power belonging to the siG3.msh\p Albatross. 

 In the following description the letters in brackets refer to pi. 18, fig. 10. 

 A is the steam-cylinder, into which the steam is conducted by the regulating 

 cylinder B, partly over and partly under the piston, and then into the con- 

 denser. C is the bed-plate of the engine, and D the condenser lying under- 

 738 



