160 



PROF. O. REYNOLDS ON THE FORMATION OF 



water are regulated either by raising or lowering the bottles 

 or hy means of the cocks in the pipes. 



The tube is fixed in an ordinary retort-stand so that the 

 blast is vertical, li, then, a small splinter of wood is held 

 downwards pointing into the spray, a lump of ice forms on 

 the end of the splinter ; and this lump has all the appearance 



