102 



ADVERTISEMENTS 



m:\v and knlargeu kdiiion 



MICROSCOPY 



THE CONSTRUCTION, THROKY, AND USE 

 OF THE MICROSCOPE 



BY EDMUND J. SPITTA 



F.R.A.S., F.R.M.S., etc. 



The Third Edition of this standard work has been 

 considerably enlarged, and twelve new plates have 

 been included. These latter consist of additional 

 test-objects for objectives of different focal length, 

 and, what is a novelty, two "critical images" to 

 assist the student to recognise critical definition. 

 Among items of special interest dealt with is an 

 explanation of the use of the new short wave-length 

 film screens in conjunction with a high-power arc- 

 lamp, for increasing the resolving power of objectives 

 of large numerical aperture, and improving the 

 definition with others of longer focal length ; and also 

 the employment of combinations specially designed 

 to deal with extra large objects at low magnifications. 

 'Tjhird Edition, with 83 half-tone reproductions 

 and 255 text illuslrations ■ - 25s. net 



LONDON : JOHN MURRAY 



SPRINGTIME 



AND OTHER ESSAYS 

 By SIR FRANCIS DARWIN 



F.K.S. 

 With Illustrations. 7s. 6d. net 



Morning Post. — "Sir Francis Darwin has a gift, 

 almost amounting to genius, for what may perhaps 

 be called the informative essay — i.e. the disserta- 

 tion which lures the reader by exhibiting curious 

 treasures of remembrance and observation ... it 

 is a book full of fine confused reading, with some- 

 thing in it to intrigue all tastes." 



CONTENTS 



Springtime 

 The Names of Char- 

 acters in Fiction 

 Thomas Hearne 

 Recollections 

 Instruments of Music 

 Sir Joseph Hooker 



The Names of British 



Plants 

 A Great Hospital 

 Sir George Airy 

 Sydney Smith 

 Dickens' Letters 

 A Procession of Flowers 



JOHN MURRAY, ALBEMARLE STREET, W.l 



THE WORKS OF 



CHARLES DARWIN 



POPULAR EDITION 



6s. net each volume 



THR ORIGIN OF SPECIES 



\',y Means of Natural Selection, or the Preservalioo 

 of Favoured Races in the Struggle for Life. (Also 

 in Murray's Library, 2s. net. J 



TPIE DESCENT OF MAN 



And Selection in Relation to Sex. With Illustra- 

 tions. 



JOURNAL OF A NATURALIST 



During a Voyage Round the World in H.NLS. 

 "Beagle." With Illustrations. 



VEGETABLE MOULD 



The Formation of Vegetable Mould through the 

 Action of Earth-worms. With Illustrations. 



FERTILISATION OF ORCHIDS 



Various Contrivances by which Orchids are 

 Fertilised by Insects. With Illustrations. 



INSECTIVOROUS PLANTS 

 VARIATION OF ANIMALS AND 

 PLANTS UNDER DOMESTICATION 



With Illustrations. In Two Volumes. 6s. net each. 



EXPRESSION OF THE EMOTIONS 



In Man and Animals. With Illustrations. 



CLIMBING PLANTS 



Movements and Habits of Climbing Plants. 

 Illustrations. 



CHARLES DARWIN 



His Life told in an Autobiographical Chapter, and in 

 a Selected Series of his Published Letters. Edited 

 by his son, Sir Francis Darwin, F.R.S. 



With 



CROSS- AND SELF-FERTILISATION 



In the Vegetable Kingdom. 9s. net. 



DIFFERENT FORMS OF FLOWERS 



On Plants of the same Species. 7s. 6d. net. 



MORE LETTERS OF 

 CHARLES DARWIN 



X Record of his Work in a hitherto Unpublished 

 Series. Edited by Sir Francis Darwin, F.R.S. , and 

 A. C. Seward. With Portraits. 2 Vols. 32s. net. 



SIR JOSEPH HOOKER 



LIFE AND LETTERS 



liy LEONARD HUXLEY, LL.D. Based on material 

 ciillccted and arranged by Lady Hooker. Sir Joseph 

 Hooker was Darwin's confidant, helper and critic for 

 fillecn years before the " Origin " appeared. The history 

 of Hooker's scientific career is also the history of many 

 friendships, revealed in his unceasing correspondence, 

 most of all with Charles Darwin. With Illustrations. 

 2nd Edition. .^6s. net. 



LONDOX : JOHN MURRAY 



