T\{E KSSEX FIELD CLUH. 1 29 



in chloroform or benzole is placed over it, the cover-glass is put on, 

 and the mount is complete. 



It is perhaps unnecessary to mention that corrosive sublimate 

 is a dangerous poison if swallowed. It should be purchased in 

 the dry condition and dissolved in warm water, and then left to cool. 

 In using osmic acid care should be taken not to breathe the fumes of 

 it or to let them act upon the eyes, as they are extremely irritating 

 to the mucous membranes. Osmic acid is sold in sealed tubes, con- 

 taining one gramme in the crystalline state ; it is soluble in cold water. 



THE ESSEX FIELD CLUB. 



Visit to the Museum of the Royal College of Surgeons. 

 Saturday, June ilth, 1892. 



On the kind invitation of Prof. Charles Stewart, M.A. (^Hunterian Curator^ and 

 President of the Linnean Society), a very pleasant and instructive visit was paid to 

 the may;nificent museum in Lincoln's Inn Fields, endeared to all nauralists as 

 being the repository of John Hunter's specimens, and as the scene of the labours 

 of Quekeit, Owen, and P"lower. 



The party first assembled in the lecture theatre, where Prof. Stewart had 

 arranged a series of very beautiful specimens illustrating the subject of symbiosis 

 in the animal kingdom, and upon which he delivered a most instructive address, 

 further illustrating various points with drawings upon the black-board. It is 

 unnecessary to give any summary of Prof. Stewart's lecture, as symbiosis formed 

 the subject of his Annual Address as President of the Linnean Society for the 

 present year, and which will he published in the Proceedings of that Society. 



On the proposal of Mr. Walter Crouch and Mr. J. Spiller, a very cordial vote 

 of thanks was passed to Prof. Stewart for his address, and for his kindness in 

 receiving the Club that afternoon. 



The Professor then conducted the party over those portions of the museum 

 more particularly interesting to the general naturalist, giving occasional demon- 

 strations. The visit was thoroughly enjoyed and appreciated by all privileged to 

 take part in it. 



Field Meeting in the Whittle and Blackmore High Woods and in 



Writtle Park. 



Saturday, June 25t!), 1892. 



This meeting was a heathland and woodland ramble, arranged at the sugges- 

 tion of the conductor, Mr. Miller Christy, F.L.S., in order to enable members to 

 inspect the fine woods of the Writtle district under more favourable conditions 

 than on the last visit of the Club to the locality. This was on May nth, 1889, 

 and the day will be long remembered as one of the wettest excursions ever under- 

 taken by the Club (see report in Essex Naturalist, vol.iii., pp. 203-208). 



