1900] MICROSCOPICAL JOURNAL. 2^. 



most ing-enious ; the motion was extremely slow, being- 

 only l-625in. for every revolution of the screw. A protest 

 had always been made in the Society ag^ainst the fine ad- 

 justment having" to carry much weig-ht, and it was there- 

 fore satisfactory to find that this one had only one-fifth of 

 the weight usually put upon the fine adjustment. The 

 President said the application of an endless screw was a 

 novel way of slowing- down the fine adjustment. The re- 

 duction of weight upon the thread was an important im- 

 provement, and the increased length of arm was another 

 g-ood feature. The President then described a new form 

 of fine adjustment by Reichert, which was shown applied 

 to his "Austrian" model, exhibited by Mr. C. Baker. The 

 indicator to this fine adjustment was movable so that it 

 could be set to zero when required, thus g-reatly facilitating- 

 the reading- of the divisions on the head of the screw. The 

 instrument was fitted with the English standard substag-e, 

 and the axis of the trunnions was placed upon the stag-e to 

 insure a better balance. Two other microscopes by Reich- 

 ert were also exhibited, one being a student's, .without 

 fine adjustment, but fitted with a dissecting loup as a sub- 

 stage condenser. The President next showed a microscope 

 fitted with hij new stepped rackwork coarse adjustment 

 by Messers. Watson and Sons. There was no loss of time, 

 thoug-h the pinion was pressed but lig-htly into the rack. 

 The President also exhibited a dissecting- stand by An- 

 drew Ross, which was about 40 or 50 years old, and was 

 still a thoroughly good working instrument, and though 

 the lenses were not achromatic they gave very good im- 

 ages. Mr. C. Lees Curties exhibited some stereoscopic 

 photo-micrographs taken on the Ives principle by Mr. E. 

 R. Turner, who briefly described the method of takino- 

 them. Dr. Hebb said they had received Part VI. of Mr. 

 Millett's reports on the Foraminifera of the Malay Archi- 

 pelago, which would be taken as read and published in the 

 Journal. Mr. F. Enock gave an extremely interesting ac- 

 count of his observations on the life-history and habits of 

 the British trap-door spiders, illustrating the subject by 

 most excellent orig-inal lantern views. 



