1900] CURRENT LITERATURE 285 
the other polar nucleus dividing independently. - This also would result 
intwo races of nuclei which might become more or less intermixed before 
fixation in a tissue. 
We await with expectation the minute investigation of the structures con- 
cemed, which should settle the question of double fertilization for maize.— 
J. M.-C. 
THE POWER of the infusoria to adjust themselves to certain changes in 
their nutrient medium is the subject of a paper by Atsushi Yasuda.” From 
anutrient fluid in which they were growing normally, the infusoria were trans- 
ferred to solutions of the following substances: saccharose, glucose, lactose, 
glycerin, KNO,, NaNO,, MgSO,, KCI, NaCl, and NH,Cl, in varying con- 
centration, The organisms used for the experiments were Euglena viridis, 
Chilomonas paramecium, Mallomonas Plasslii, Colpidium colpoda, and Para- 
mecium candatum. In general, excepting Euglena, these can withstand 
about 6 per cent. of glucose, while Euglena withstands 1] per cent. With 
instead of 4°, as above. In the case of the electrolytes it is still greater, 
usually however less than unity. Aspergillus ntger withstands over 50 per 
“ent. of glucose and 21 per cent of NaNO, (Eschenhagen), and Zygnema 
Put has also deprived it of its proper food supply. This, it — 
an 
“ osmotic chan 
More conc 
'sm, and its outline becomes uneven.— BURTON EDWARD Liv- 
Studien ; i oo 
_~i@leniber die A Wee i ee : n concentrirte Los- 
: Oe Joi, Coll. § npassungsfahigkeit einiger Infusorien an cones” ™ = 
ci. Imp. Univ. Tokyd 13: 101-140. pls. 20-72. ‘1900 
the other sugars the ratio is nearly the same, but with glycerin it is about $ 
* 
