﻿GREENHOUGH' 

 STEREOSCOPIC 



MICROSCOPE. 



Two Microscope tubes are 

 so arranged as to bring the 

 same object into focus in the 

 axis of each tube, the tubes 

 being set at an angle to each 

 other for this purpose. The 

 stand is provided with rack 

 and pinion adjustment. The 

 image is erected by Porro 

 prisms. 



Price, with one pair of objectives 

 and eyepieces . . £10 



Additional objectives per pair 



£2 



Additional eyepieces per pair 



£0 10 



E. Leitz, 



18 BLOOMSBURY SQUARE, 

 LONDON, W.G. 



Microscopes for all classes of 

 work, Aplanatic Pocket Lenses, 

 Microtomes, Plioto-micrographic 

 Apparatus, Universal Projection 

 Apparatus, &c. 



SPRING INSECTS.— Ova and Pupas of very many 

 species. Also line well-set and recent specimens of 

 British Macro- and Micro-Lepidoptera, Coleoptera, Hymenoptera (Acu- 

 leata, Tentliredinidse, Ichneumonidte and Chrysididai), Hemiptera, Diptera, 

 and other Insects. 



PRICE LISTS OF ANY OBDHE SENT ON APPLICATION. 



W. H. HARWOOD & SON, ENTOMOLOGISTS, COLCHESTER. 



FOR SALE. 



Tutt's 'British Lepidoptera,' vols. I. to X. 



' British Butterflies/ vols. I. to III. 



,, 'British Noctuse,' vols. I. to IV. 



,, ' Practical Hints for the Field 



Lepidopterist,' parts I. to III., with Index. 



A few copies of ' British Noctuas,' shglitly soiled, to he sold cheaply. 

 A. M. COCHRANE, 41, WISTERIA ROAD, LEWISHAM, S.E. 



