1892.] Noteworthy Anatomical and Physiological Researches. 157 
Noteworthy anatomical and physiological researches. 
Gases in massive organs}. 
While this paper does not contribute very much that is new 
it is interesting as a careful record of experiment and as a 
verification of earlier researches. The author has availed 
himself of the more recent method of gas-analysis and brings 
out some interesting points, particularly regarding the press- 
ure of internal atmospheres in plant-organs. In general his 
method is to produce an artificial chamber by perforating the 
fruit or tuber or root to be observed and in the /acuna arti- 
ficielle thus produced to insert a tube, with the lower end sunk 
mamercury-bath from the upper portion of which tube, as 
needed, alittle gas can be taken for analysis. Inthis way itis pos- 
sible to have under one’s eye the changes that may take place 
and the differences, if any exist, between the internal and the 
external air are clearly distinguished. Potato-tubers and sev- 
iste otion to the nit The oxygen tends 
to : e nitrogen. 3. yg' 
to be qattibuted through pores (effusion), but the CO, tends 
ity acts Siete > scaeble de membranes (dialysis). 4. Humid- 
ad ee 
