418 



SCIENCE. 



[Vol. V., No. 120. 



in quanttty as will successfully accomplish the 

 following purposes : namely, first, to illustrate, 

 amplify, and explain the use and bearing of 

 the theoretical training ; and, second, by some 

 actual experience to eradicate the conceit and 

 superficiality which so often follows from book- 

 knowledge only, and in this way to give the 

 student a suitable introduction to the world. 

 Experience shows that this course gives a 

 student an insight into the bearing and use of 



cally, in a laboratory for instruction it is 

 desirable, on the other hand, not to have the 

 machines and furnaces run automatically, else 

 the students will fail to gain the very experi- 

 ence which they need. 



When the students begin their work on ores 

 in the last year of their course, they are already 

 practised analysts, having had a three-years' 

 training in the chemical laboratories, and a 

 course in assaying. They are already looking 



— — - 



' 



SIP 



Water jacketed furnace for copper or lead. 

 Slag-kettle. 



Lead reverberatory furnace. 



Lead-kettle. 



FURNACE-ROOM. 



;verberatory furnace. 



much of his mental work, and serves as an 

 initiation to his profession where competition 

 is sharp, and only the most teachable and in- 

 dustrious can survive. 



The new mining laboratories have an area 

 of floor-space of between five and six thousand 

 square feet. The} T are furnished with ap- 

 paratus for the mechanical preparation of ores 

 for furnace-work, for lixiviation, and for assa}'- 

 .ng, each of these subjects being assigned a 

 separate room. The machines and furnaces 

 are arranged in a manner which an experience 

 of thirteen 3-ears has shown to be the best for 

 the class-work of students. While in a large 

 establishment it is desirable to have as many 

 as possible of the machines run automati- 



toward actual work in eight months' time, and 

 they fully appreciate the opportunity given 

 them to make a somewhat intimate acquaint- 

 ance with the tools and processes of the profes- 

 sions they hope to follow. 



A few examples of investigations which have 

 been made will suffice for illustration. Two 

 students were given gold ores to treat. The 

 first one had an ore from New Hampshire 

 weighing 4,440 pounds : the second had an ore 

 from Nova Scotia weighing 1,400 pounds. 

 The problem given them to solve in the case 

 of each ore was as follows : 1 . Is the ore a 

 free-milling ore? 2. Is the gold in a fine, or 

 coarse condition ? 3. How many amalgamated 

 plates are needed to catch the whole of the 



