PHILADELPHIA 
No. 264:8 No. 2656* No. 2659 
2648. Automatic Zero Burette and Clamps, essential for accurate phe- 
nolphthalein tests, etc. The liquid is drawn over the syphon 
tube by suction on the rubber tube until the burette is filled 
past the zero mark, when suction is stopped and the liquid 
will run back into the bottle, leaving the column in the burette 
exactly at zero. 
Price, Complete, 25 c.c. in i/io $4 50 
" " 50 c.c. in i/io 5 00 
2650. Graduated Bottle for injecting: a measured amount of toxin 
into horses, with double hand bulb, nickel-plated stopper, 
clamp, tubing, stopcock and needle. As used by Philadel- 
phia and Baltimore Boards of Health, etc 10 00 
2652. Burette, with three-way stopcock, for filling; antitoxin bottles. 
The antitoxin runs into the burette by a turn of the stopcock, 
and the measured amount is emptied into the bottle by another 
quarter-turn of the same stopcock. As used by H. K. Mul- 
ford & Co., Philadelphia 4 00 
2654. Pease's Apparatus for Aseptic Filtration of Antitoxin. 
As used by Philadelphia Board of Health. Absolutely no 
risk of contamination. Price 10 00 
2656. Apparatus for filling test-tube with a measured amount of cul- 
ture media, consisting of glass bulb, burette and stopcock 
complete 6 00 
2658. Hill's Double Outlet Tube, of glass, for attachment to funnel 
when filling tubes with media. Prevents wetting the mouth 
of tube, and thus prevents the sticking of the cotton plugs. 
Price 25 
2659. Burette Attachment for Refilling.— With pinch cocks ... 60 
lOI 
