5 
Loss in the 
syringe. 
( 6) 
0. 0272 
A special syringe, “Sub Q” joint. 
no shoulder. 
( 7 ) 
.0224 
A special syringe, “Sub Q” joint. 
no shoulder. 
- ( 8) 
.0315 
A special syringe, “Sub Q” joint. 
no shoulder. 
( 9 ) 
.0119 
A special syringe, “Sub Q” joint. 
no shoulder. 
(10) 
.0232 
A special syringe, “Sub Q” joint. 
no shoulder. 
(11) 
.0401 
A special syringe, “Sub Q” joint. 
no shoulder. 
(12) 
.3363 
Colin syringe with old packing. 
(13) 
.0871 
Colin syringe with old packing. 
(14) 
.0276 
New Colin syringe. 
(15) 
. 0855 
New Colin syringe. 
(16) 
. 0747 
New Colin syringe. 
(17) 
. 1153 
New Colin syringe. 
(18) 
. 0969 
New Colin syringe. 
18) 1. 0862 
. 0603 
Average loss in the syringe. 
More is lost in the syring-e than in the graduate, and the two together 
make an appreciable amount, in one instance (weighing No. 12) to 
more than 8 per cent of the amount of fluid used. 
The neio method . — To avoid these errors, the amount of fluid which 
the animal is to receive is now measured directly into the barrel of 
the syringe, thereby totally eliminating the loss in the graduate; and 
the fluid remaining in the syringe after it is emptied, is washed out 
with sterile salt solution or other suitable fluid which is then injected 
into the animal, so that the loss, if any, is not appreciable. 
The syringe used for carrying out this technique is a modification 
of the old Koch syringe. The glass barrels for the syringe were made 
for me by the Randall-Faichney Company, of Boston, who mold a 
thread in the glass on the end of the barrel so that the needle screws 
directly upon the glass. This is a distinct advantage and has many 
points to recommend it over the old slip joint, particularly in that the 
joint is very tight, and no amount of pressure can force the needle 
from its bearings. 
The bulb was made for me by Lenz & Lossau, of Washington, D. C., 
and as will be seen by reference to the illustration, difl'ers from the 
Koch pattern in that there is no stopcock. The soft rubber stopper 
fits into the S 3 U-inge like the cork in a bottle (see fig. 2) and is 
adjusted more readih" than the ground glass and metal cap of the 
Koch syringe. 
Note that the barrel tapers graduallj^ to the needle so that the last 
drop will readih^ run out. The top has a slight flange which is hand}' 
in holding the syringe in use. 
