TRANSACTIOI^S OF MICROSCOPICAL SOCIETY. 
DESCRIPTION OF PLATES III & IV, 
Illustrating Mr. Jabez Hogg^s paper on Vegetable Parasites. 
PLATE III. 
Pig. 
1, a. — Second day, specimen from No. 1. Paviis-ferment in barley- 
wort, set aside in a darkened room. Yeast-cells, chiefly ovoid in 
form, with spores and a few epithelium-scales. 
1, h. — Pifth day, specimen from No. 1. The yeast-cells more circular 
in form and larger in size. Spores and torulee, with bacterium-like 
bodies in an active state. 
1, c. — Tenth day, specimen from No. 1. Yeast-cells slightly degene- 
rating, becoming more ovoid ; torulse and bacteria. 
2, a. — Pifth day, specimen from No. 2, freely exposed to light. Small 
growth of yeast-cells, with spores and tufts of mycelia, penicillium, 
and a few large epithelium-scales; bacterium-like bodies not drawn. 
2. h. — Tenth day, specimen from No. 2. Yeast-cells degeneratiug and 
disappearing; spores of mould, mycelia, and bacteria increasing. 
3. — Healthy yeast-cells fresh from a porter brewery, drawn rather 
smaller than they measured. 
4. — Portion of a scab taken from a boy suffering from eczema of eye- 
lids and impetigo of scalp, showing spores, moniiiform chains, torulse 
mycelium, and epithelium-scales. 
PLATE lY. 
1. — Presh yeast transferred to a saccharine solution, and showing on 
the second day a tendency to degenerate. 
2. — Degenerated or exhausted yeast taken from the bottom of a porter- 
vat ; cells nearly all void, and torulse abundant. 
3. — Pavus-fungus grown in a pure saccharine solution. 
4. — Aerozoa. Spores with mycelium, &c., taken in the atmosphere during 
the cholera visitation of 1858. 
5. — Penicillium -spores. Mould growing in saccharine solution. 
6. — Aspergillus-spores growing in saccharine solution. 
7. — Puccinia-spores growing in saccharine solution. 
Magnified 400 diameters. 
