1006 



INDEX. 



W. 



Model Microscope (Swift's), 

 for large 



Wale's 



296. 

 Waller's Section-knife 



Sections, 954. 

 Wallis's Calotte Substa^e, 125. 

 Warm Spring, Algte of the Hercules, 



95. 



Stage, Bartloy's, 672. 



Water-plants, Influence of Physical 



Conditions on the Form of, 915. 

 Watson's Mechanical and Rotating 



Stage, 300. 



Microscope-Stand, 516. 



Wax for Dry-mounting Opaque Ob- 

 jects, 536. 



Cells, 139, 703, 704. 



for Mounting, 975. 



, How to make, 538. 



with White Zinc Cement for 



Fluid Mounts, 538. 

 Wenham's Disk Illuminator, 664. 

 White Zinc Cement, Wax Cells with, 



for Fluid Mounts, 538. 

 Wide-angled Immersion Objectives, 



Value of, 303, 359, 865. 

 Pencils, Conditions of 



Aplanatism for, 831. 

 Wight's Growing- slide, 672. 

 Williams's Freezing Microtome, 697. 

 Wings of the Hymeuoptera, 35. 



Working Distance and its relations to 

 Focal Length and Aperture, 692. 



Worms, Action of, in the Formation of 

 Vegetable Mould, 888. 



Xanthin, Formation of, in the Ger- 

 mination of Seeds, 918. 



Yolk, Secondary, in the Germinal 

 Vesicle of Mammalia, 7. 



Z. 



Zeiss's Camera Lucida with Two 



Prisms, 818, 940. 

 — — Microtome, 699. 

 Zimmermann's Slides of Micro-fungi, 



979. 

 Zoantharia of the Gulf of Marseilles, 



55. 

 Zoology. See Contents, x. 

 Zooids of Sponge, Supposed Hetero- 



morphic, 899. 

 Zooph y te Trough , Live-Box, or Growing 



Slide, Fase's, 824. 

 Zoospores, Conjugation of, in Dasy- 



cladus, 96. 



PRINTED BT WILLIAM CLOWES AND SONS, LIMITED, STAMFORD STREET 

 AND CHARING CK085. 



