222 



THE CHEMICAL CONTROL OP THE DAIEY. 



The metliod has been subjected to a close investigation by the 

 .author, and is of considerable accuracy. 



The Beimling Machine. — This consists of a cast-iron frame- 

 work carrying a vertical spindle ; on this is a small bevelled cog- 

 wheel, which engages a larger bevelled cog-wheel on a horizontal 

 spindle turned by means of a handle. In the larger machines 

 a second spindle and set of cogs is introduced (Fig. 22). 



On the top of the vertical spindle two, three, or six arms 

 extending radially are fixed. To the ends of each of these are 

 pivoted one or usually two cups, in which the bottles are 

 placed. 



When the handle is turned, the cogs cause the spindle and the 

 arms carrying the cups to rotate. For one turn of the handle, 



Fig. 22. — Leffmann-Beam Machine. 



the vertical spindle turns eleven times. Centrifugal force causes 

 the cups to assume a horizontal position when rotating, and they 

 return to the vertical when the machine is at rest. 



The bearings are all plain, which causes a considerable amount 

 ■of friction ; the centre of gravity of the rotating system is placed 

 very high, which causes vibration, due to imperfect balancing, 

 to be marked. The air resistance at high speeds is somewhat 

 »reat. 



These are serious faults, but are capable of improvement. The 

 two-bottle Beimling machine is the only machine on the market, 

 to the author's knowledge, in which the bottles assume a hori- 

 jsontal and radial position when rotating ; in the larger sizes the 



