62 APPEiroix. 



The upper surface of the lake is about 3,280 yards long and 

 197 yards wide, and it covers an area of over 774,715 square yards, 

 or about equal to 160 English acres. The whole cost of the dam 

 and sluice works was estimated at £14,600, and the estimate is 

 not likely to be overstepped by the actual expenditure. Up to 

 the end of last year's balancing of accounts, and when the work 

 was nearly completed, the expenditure on the same had been only 

 £13,247. This fortunate calculation of the estimates is owing to 

 the foresight and knowledge of the director, and so also the esti- 

 mate of the value of the building materials, the stone, the pebbles, 

 sand, &c., in the neighbourhood of the place, proved that the cost 

 of each cubic metre of cement concrete (1'334 cubic yards) did 

 not exceed from 5s. lOd. to 6s. 8d. 



2.— The "Waterworks for the Hydraulic Motors. Fig. 3. 



By reason of the above described dam and sluice work, as already 

 stated, the raising of the Saane water to from 33 to 39 feet, the 

 enormous force of from 2,600 to 4,000 horse-power is obtained. 

 Eor the perfect utilization of this enormous water-power a num- 

 ber of turbines, after the system of Grirard, are adopted, in which 

 the water is led through the canal A, B, C, D (fig. 2), which is 

 54 feet 1 inch broad. Up to the present time only two turbines 

 are laid on. These as well as the other driving machinery were 

 made at "Winterthur. The other water space or room, now in 

 progress of building, is planned to carry four turbines, and in all 

 probability it will soon become necessary that the other and 

 further intended two turbines should. also be carried out. 



From the 1,200 horse-power which will be obtained through 

 these turbines, 600 horse-power will be taken for the driving of 

 those works which are already in progress of erection, and 600 

 horse-power will be reserved for the lifting of the drinking water 

 into the high-level reservoir at Quintzet, which is 525 feet above 

 the dam. For the commencement, and as long as there are only 

 two turbines at work, there will only be the half of this dis- 

 posable power given to these undertakings. 



For the transmission of the mechanical driving power of those 

 industrial works which are now getting ready, and for others that 

 are in contemplation, the so-called telodynamic cable will be 

 brought to bear ; these we shall describe more particularly in 

 our 4th division of this paper. For the lifting of the drinking 

 water to the high-level reservoir at Quintzet, four of Grirard's 

 double pumps will be applied, besides the cast-iron piping which 

 we will desci'ibe more closely in our 6th division. The above- 

 named four pumps will be made at Vevay, on the lake of Greneva, 

 and the piping at Solothurn. 



The building for the turbines and pumps will be 152|feet long 

 and 73 feet broad, and is to be entirely brought up from a rocky 



