748 General Notes. [July, 
was exhibited in the room under a 4 in. objective by Mr. Powell. 
It was a section of Triceratium favus, and the excellence of the 
specimen gave rise to the impression that something even more 
difficult than this could be accomplished. Amongst the other 
specimens sent were some very clean-cut sections giving an ex- 
ceptionally clear image. It was stated by Dr. Flogel that as 
many as 174 transverse sections had been made of one diatom., 
all of which could be plainly identified as belonging to the same 
diatom. Mr. Mayall said that he could not pledge himself as to 
the correctness or otherwise of the theory set up by the author 
of the paper, as the subject was not one which he had made his 
own, although he had taken some pains to translate the paper for 
publication in the journal of the society. ` 
Mr. Mayall then read an abstract of the paper to the meeting, 
and the subject was discussed by Mr. Curties, Mr. Crisp and 
fellows. 4 
The chairman in proposing a vote of thanks to Mr. Flogel for 
his paper, said that he was sure the society would feel doubly in- 
debted to Mr. Mayall for the exertions which he had made to 
procure the paper, and also for the trouble he had taken in the 
matter of translation. 
Mr. W. J. Solias’s letter on the subject of cutting sections of 
diatoms was formally laid before the meeting. -It had reference 
of diatoms. My plan is to scrape off a green slime from om 
river mud, consisting chiefly of Pleurosigma sigzag, 5 
bringing ail the diatoms with it, but leaving the mud. “seniog 
lin with the diatom film is now immersed in the usual ers and 
and staining reagents. I have used a mixture of chromic @ 
osmic acids and absolute alcohol for hardening; borax d har- 
d S ned an 
i ; , “ab out passing 
be mounted direct in glycerine on a glass slide ba 
through water. By employing these two proces 
: 
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