XXll CONTENTS. 



PAGE 



Rahenhorst's Cryptogamic Flora of Germany, ^-c Part 5 683 



Structure and Fertilization of Floridem „ 691 



New Cyanophycea „ 694 



Organic Bodies in the Thermal Waters of the Pyrenees . . „ 694 



Fossil Confertites , 694 



Cell-division in Closterium „ 695 



Sections of Diatoms „ 695 



Protococcus pluvialis to show Nucleus ,, 775 



Cell-nucleus and Pores in the Walls of Phycochromacece . . Part 6 885 



Fossil AlgcB „ 885 



Occurrence of Aphanizomenon Flos-aquce in Ice ., .. „ 886 



Ovulites, a Group of Dichotomous Siphonece „ 886 



New Type of Alg(B in Stigmaria-coal „ 887 



Parasitic Alga-like Plants in Russian Coal „ 887 



Sphceroplea annulina „ 888 



Volvox globator. Is it a hollow sphered , 889 



Sections of Pinnularia, (Figs. 155 and 156) „ 891 



MICROSCOPY, 

 a. Instruments, Accessories, &c. 



Use of Incandescence Lamps as Accessories to the Microscope 



{Figs.l-Q) Parti 29 



Boecker's Air-pump Microscope. (Fig. 7) „ 112 



Imp>roved Griffith Cluh Microscope. (Figs, %-lQ) .. .. „ 113 



'' Midget" Microscope. (Fig. 11) „ 116 



Microscopes for the Examination of Divided Circles. (Figs. 



]2anc?13) „ 116 



Abbe's Camera Lucida ,, 119 



Camerm Lucidce of Nobert and of Doyire and of Mibie- 



Edwards. (Figs, li: and 15) „ 119 



Grunow's Camera Lucida „ 120 



Objectives of Large Ajxrture „ 120 



Abbe's Method of Testing Objectives. (Figs. 16-10) .. „ 120' 



Hardy's Chromatoscope. (Figs. 20 and 21) „ 126 



Gundlach's Substage Refractor „ 127 



Tolles' Frontal-prism Illuminator. (Fig. 22) „ 127 



Warm and Moist Stages. (Figs. 23-25) „ 128 



Dibdin's Hot Stage „ 131 



Caton's Fish-trough. (Fig 26) „ 131 



Dayton's Modification of the Wenham Half-disk Illuminator. 



(Figs. 21 and 2%) , 132 



How to turn over Small Objects „ 133 



Tolles' Amplifier „ 133 



" Jumbo " and " Midget " Microscopes , 135 



Live Cage for Dry Objects „ 135 



Pease's Nose-piece „ 136 



Binocular Vision in the Study of the DiatoinacecB .. .. „ ] 54 



The President's Address Part 2 172 



Coppock's ComJjination Microscope. (Fig. 36) „ 265 



Crouch's Portable Histological Microscope. (Figs. 37 and 



38) , 266 



