British Association for the Advancement of Science. 11 
disease. Baillie and Bostock had stated it to be rare, whilst 
French and German anatomists had pronounced it frequent in the 
generality of the human species. 'The author states, from his 
own experience, that out of twenty-eight individuals he had 
opened, who had died of various diseases, and varied in age and 
sex—the youngest being fourteen—he had found the T'richoce- 
phalus dispar in twenty-five. Dr. Richardson added, that in the 
lower mammalia and in fish, the ceca were frequently found 
filled, in some literally crammed with Botryocephali, ranging from 
a yard to a yard and a half in length ; and what was remarkable, 
the animals appeared to be as healthy and vigorous as if they 
were not infested. 
Plants growing under G‘lass.—In April last, Dr. Daubeny in- 
troduced into globular glass vessels, their aperture being covered 
with bladders, three several sets of plants. In the first were ee 
dum, Lobelia, &c.; in the second, Primula, Alchemilla, &c. ; 
the third, Armeria, Sempervivum, &c. At the end of ten eh 
the plants were healthy, and had grown. The air in the jars 
was examined, when it was found that the first had four per cent. 
more oxygen than the atmosphere, the second also four per cent. 
more, and the third one per cent. more. This was the result of 
examination during the day, but at night the excess of oxygen 
had disappeared. On the eleventh day, the first jar contained 
two per cent., the second and third one per cent. excess of oxy- 
gen. At night there was less oxygen than in the atmosphere. 
On the 20th of June the following results were obtained : in first 
jar, two and a half per cent., in second jar, three and a quarter per 
cent:, and in third jar, four per cent. less oxygen than in atmos- 
pheric air. Some experiments were then made to determine the 
rate of access of air to the plants through the bladder, and it was 
found that when the jars were filled with oxygen, the avérage 
rate at which it escaped till the internal air was like that of the 
atmosphere, was eleven per cent. daily. 
Prof. Lindley then read a paper by Mr. Ward on the same sub- 
ject. The Professor observed, that Mr. Ward, of Wellclose Square, 
London, had made many experiments on the subject of keeping 
plants in unventilated vessels, and was the original proposer of the 
plan for preserving plants in this manner. The discovery of their 
being able to be thus preserved, was of great practical importance, 
as it enabled us to bring plants from foreign climates, that could _ 
