OTHER BOOKS AVAILABLE (canid)

The Origin and Development of the Microscope, by Disney, Hill, and Watson-Baker.

In this volume an attempt has been made to survey the pi ogress, from earliest times, of the optical ideas pertinent to the evolution of instruments of vision, special notice being given to the development of the microscope, and the investigation has been brought down to A.D. 1673. The period reviewed covers some 2,000 years, beginning with mention of the writings of Euclid (300 B.C.), continuing with reference to the Arabian opticians of the ninth to the eleventh centuries A.D., and on through the ages, closing with an account of Joannes Hevelius’s work, the “ Machina Coelestis,” which was published in Danzig in 1673.

The second portion of the volume is occupied with a catalogue and illustrations of the instruments in the possession of the Royal Microscopical Society, together with a bibliography of the original authorities to be found in the library of that Society.

The 303 pages of this book are filled with much that is of interest to the micro-scopist, and although originally published at 17s. 6d., is offered to Watson’s customers at the special price of 5s. Od.

The Microscope. How to Choose and Use It, by Dowdy.

This book was written in 1921 as an introductory wrork on the subject, in an endeavour to include only information needed for the actual working conditions and to express that information as free from technicality as possible. It is divided into eight chapters : (1) Lenses and the Origin of the Microscope, (2) The Simple Microscope, (3) The Compound Microscope, (4) The Optical System of the Microscope, (5) The Substage Condenser, (6) How to Use the Microscope, (7) Preparation and Mounting of Micro Objects, (8) Photography with the Microscope. Originally published at 5s. 6d., it is offered for 2s. Od.

ANATOMICAL MODEL

(New, made of Papier Mache.) £ s. d.

Human Female Pelvis, natural size, with ligaments . . . . . . 2 12 6

MICROSCOPIC OBJECTS

£ s. d.

Group of 65 Diatoms, symmetrically arranged, by Suter . . ... 050

Butterfly Scales, arranged as a bouquet of flowers, and sundry flies, by

Dalton . . . . .... . . . . . . 1 10 0

Group of Flower Seeds, opaque mount ... . . . . . . 0 2 0

Selected Butterfly Scales, arranged in small floral design, by Firth . . 0 7 6

Selected Butterfly Scales, arranged in small geometric design, by Firth 0 7 6

Group of Too Diatoms from Africa, by Watson .. .. .. .. 012 6

Group of xoo Diatoms from Simbirsk, bjr Watson . . . . . . 0 12 6

Preparation of Isatine for Polariscope, by Clarke and Page . . . . 0 1 6

Foraminifera, arranged in a small group .. .. .. .. ..020

Gall-Fly, Trypeta Winthemi, female, by Enock, in balsam . . . . 0 16

Wood Spider, Clubiona, female, by Enock, in balsam . . . . . . 0 16

Wood Spider, Philodromus, male, by Enock, in balsam . . . . 0 16

First Leg of a Solitary Bee, Megachile, male, by Enock, mounted in

fluid .. .. .. .. •• •• ..016

Head of Gnat, Anopheles maculipennis, male, in balsam, by Enock . . 0 1 6

In addition to the large stock of Microscopic Objects as detailed in Part 3 of the Catalogue, W. Watson & Sons, Ltd., have also a good number of second-hand slides, comprising Zoology, Geology, Histology, Opaque Mounts, etc. All the slides are in good condition, and are mostly the work of well-known mounters. Selections of slides are willingly sent on approval, on receipt of a deposit to their value. Should, however, the microscopist have an account with us, no remittance need be sent. Price of second-hand slides, 6d. each. (No list of these is available.)

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Le texte affiché peut comporter un certain nombre d'erreurs. En effet, le mode texte de ce document a été généré de façon automatique par un programme de reconnaissance optique de caractères (OCR). Le taux de reconnaissance estimé pour cette page est de 98,53 %.

La langue de reconnaissance de l'OCR est l'Anglais.

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