BULLETIN 102, U. S. DEPARTMENT OF AGRICULTURE. 



LIST OF NECESSARY APPARATUS. 



(1) Mill. 



(2) Balance. 



(3) Erlenmeyer flasks, cork or rubber 

 stoppers to fit. 



(4) Pipette, 50 c. c. 



(5) Funnels, 3-inch. 



(6) Graduates, 25 c. c. 



(7) Beakers, 250 c. c. 



(8) Burette, 50 c. c. 



(9) Filter stand. 



(10) Hydrometer, reading between 

 0.700 and 1,000. 



DESCRIPTION OP APPARATUS. 



Mill. — Any small hand mill can be used for grinding the samples, 

 but where a large number of samples is to be handled, a power mill 

 similar to the one shown in figure 1 is practically indispensable. 



Any make of power mill similar to the one 

 illustrated will be found satisfactory. 



Balance. — Any chemical balance will 

 answer for weighing the samples, but a 

 balance like the one illustrated in figure 

 2 will greatly facilitate the work and will 

 be found accurate and speedy and not as 

 complicated as most chemical balances. 

 Pipettes. — Where only a few samples 

 are to be analyzed, a 50 c. c. standard- 

 ized pipette will serve for adding the 

 alcohol, but where many samples are to 

 be analyzed an automatic 50 c. c. 

 burette, such as is illustrated in figure 4, 

 will be a decided advantage. An or- 

 dinary standardized 75 c. c. pipette will 

 suffice for measuring the water, but 

 where many samples are to be handled 

 an automatic 75 c. c. pipette (illustrated 

 in fig. 3) will be a great help both in 

 time and accuracy. 



Burettes. — A 50 c. c. Squibbs burette 

 will be found very satisfactory in titrat- 

 ing (fig. 5) 



Filter stand. — Aconvenientfilterstand 

 is illustrated in figure 6. It accommo- 

 dates 60 funnels and graduates and is 

 a great space saver over many other 

 types. 



Brain stand. — A wooden stand like the one shown in figure 7 will be 

 a great help in drying and protecting the glassware. This model can 

 be easily moved about, enabling one to move many flasks or beakers 

 at once, thus saving many steps and valuable time. 



Fig. 3.— Bailey's automatic pipette (7i 

 c. e.) connected with bottle of <listille< 

 wal er. 



