; 
4 
| 
| 
: 
7 
1892. ] Notes and News. 31 
ing, which is completed in a few minutes, should be watched under 
the microscope, as should also the toning down. The most successful 
preemanod show the ground-substance dark red, the crystalloid yel- 
ow with sharp contours, and the globoid nearly colorless to reddish. 
II. Picro-nigrosin method. Place the section in alcoholic-picro- 
nigrosin (a saturated solution of picric acid in absolute alcohol+-nigrosin 
approximately to saturation) in which it is allowed to remain until the 
ground-substance of the aleurone grain shows a blue coloration. This 
alsam, removing the clove oil with filter paper. ‘The most successful 
preparations show the ground substance blue, the globoid colorless, 
and the crystalloid yellowish green and sharply limited. 
’ Tue difficulty of keeping Irish potatoes in edible condition in late 
spring is well known to housekeepers, farmers, and merchants. Pro-_ 
fessor Schribaux of the National College of Agriculture of France 
has recently devised a very simple, cheap, and successful method by 
which he has been able to preserve ile aie in edible condition for 
over a year and a half. ‘This process 
The same liquid may be used any number of times with equally 
. (N. Am. 
var. Californica Lesq.—(Calif.) : 
var. Oregonensis R. & C.—(Oregon.) 
var. rigens R. & C.—(Vancouver: Wash.) 
var. ambigua Card.—(Oregon.) 
