BY DR. KLEIN. 115 



which is fitted by a cork into one of the tubulaturcs of a large 

 WoolfFs bottle, the bottom of which it almost touches. In 

 the other neck of the bottle a cork is also fitted, which con- 

 tains a short glass tube bent at the top ; this is connected by 

 a flexible tube with the stem of a T-shaped tube, one branch 

 of which leads to a manometer, the other to a second smaller 

 Woolffs bottle, in which the injection mass is contained. The 

 long flexible tube which leads from the suspended bottle must 

 be furnished with a clamp, and another is required on the tube 

 which connects the T with the injection-flask. Another ar- 

 rangement consists of a large flask holding several gallons, in 

 the mouth of which a large India-rubber stopper can be fitted. 

 At the bottom there is a side tubulature (for discharging the 

 water when necessary), into which a second stopper must be 

 fitted. The stopper contains a strong glass tube, having a bit 

 of India-rubber tube fitted to it, guarded by a strong clamp. 

 In the large stopper are two glass tubes, one of which is short, 

 not extending beyond the neck, and bent at the top; it is con- 

 nected with a T tube, which corresponds to the one employed 

 in the apparatus first described. The second tube is of the 

 same form as the first, and communicates with a supply-tap. 

 In other forms of apparatus mercury is used. The apparatus 

 may then consist merely in a single WoolfPs bottle, into one 

 of the necks of which a rose funnel is fitted, reaching to the 

 bottom. The other neck contains a short bent glass tube, 

 which communicates with the T tube as before. 1 In all forms 

 of apparatus for injection, it is necessary to take the greatest 

 care to make all the junctions absolutely air-tight. 



The injection mass is always contained as above described 

 in a Woolff's bottle, which should be previously graduated, so 

 that the operator may know as he proceeds how much has 

 been injected. One of the necks of the bottle is in communi- 

 cation with the T tuj)e, by means of a short glass tube fitted 

 with a caoutchouc connector, which does not reach below the 

 vulcanite stopper in which it is fixed. In the other, a long 

 tube is contained, the end of which reaches to the bottom of 

 the bottle, while the top communicates with the canula. If a 

 metal canula is used, the India-rubber tube is fitted on to the 

 stopcock. If the canula is of glass, it is guarded by a screw- 

 clamp. 



When the organ or animal to be injected is small, it answers 

 well to use the syringe as a compression air-pump, by con- 

 necting it with the short tube of the WoolfTs bottle. The 

 superiority of this method over the direct use of the syringe 



1 Of the more complicated forms of mercurial apparatus, that devised 

 by Tiering (which is to be had of Heinitz, instrument maker in Vienna) 

 is undoubtedly the best, and answers all requirements. A description 

 of it will be found in the Wiener Sitzungsbericlite. 



