142 EYE SPY 
vertical direction, without the slightest side mo- 
tion, the spore-print in all its beauty will be re- 
vealed perhaps a rich brown circular patch with 
exquisite radiating white lines, marking the direc- 
tion and edges of the gills, if an Agaric ; perhaps 
a delicate pink, more or less clouded disk, here 
and there distinctly and finely honey-combed with 
white lines, indicating that our specimen is one of 
the polypores, as a Boletus. Other prints will 
yield rich golden disks, and there will be prints 
of red, lilac, greens, oranges, salmon - pinks, and 
browns and purples, variously lined in accordance 
with the number and nature of the gills or pores. 
Occasionally we shall look in vain for our print, 
which may signify that our specimen had already 
scattered its spores ere we had found it, or, what 
is more likely, that the spores are invisible upon 
the paper, owing to their whiteness, in which case 
a piece of black paper must be substituted for the 
white ground, when the response will be beauti- 
fully manifest in a white tracery upon the black 
background. One of these, from the Amanila 
muscarius, is reproduced in our illustration. If 
the specimen is left too long, the spore -deposit 
is continued upward between the gills, and may 
reach a quarter of an inch in height, in which 
case, if extreme care in lifting the cap is used, we 
observe a very realistic counterfeit of the gills of 
the mushroom in high relief upon the paper. A 
