651 
The contrivance just described is a part of the large apparatus represented in 
fig. 1, which consists of three metal vessels, mounted, together with their revol- 
ving disc, on a plank that can be moved to and fro, The gut can now be trans- 
Fig. 1. 
Apparatus for the registration of the movements of a surviving 
organ, provided with a simple arrangement for washing out the added 
poisons and for operating at various temperatures. 
ferred at will to each of the 6 vessels of the apparatus (this is also of importance 
when examining the action of poisons at a different temperature). 
Here, then, we have an arrangement of three vessels of 75 c.c. and three ves- 
sels of 150 c.c. to which the surviving gut can be transposed. One of the three 
metal vessels was displaced in some of the experiments by a large glass vessel 
containing 1300 c.c. of Tyrode solution and in which also a thermoregulator was 
placed and a tube through which the fluid was oxygenated. When the gut was 
put into this large vessel, the action of a definite dosis of atropin could be watched 
with a dilution twenty times stronger than when an equal dosis of atropin was 
examined in one of. the small vessels, which contained only 65 c.c. 
In a series of experiments we tried to ascertain whether the 
pilocarpin-action indeed depended only on the concentration. This 
appeared to be the case, so that in this respect we quite agree 
with v. LiptH Dr JEUDE and consequently our experiments pertinent 
to the matter in question may readily be left out. 
In another series we examined the question whether atropin can 
be washed out. 
This was to the following effect : 
Atropin-action is completely reversible, for when the gut is put 
