- Media: CD-ROM
Preface in order to call attention to the altered circumstances under which this work is now presented to the reader. If the development of Astronomy between 1867 and 1877 was great, its development between 1877 and 1889 has been still greater. And besides this, there were important omissions in the ground-plan of the book which I have long been very desirous of making good, whenever time or opportunity became available.
The last edition having reached to nearly 1000 pages it became quite clear that the now necessary additions would have swelled the work to a bulk and consequent price which probably the Public would not have regarded with favour. Accordingly when its division into two volumes became a necessity, I determined to make the two into three, and to complete the undertaking as originally conceived twenty-nine years ago.
The work will therefore henceforth be published in three divisions as follows :
I. The Sun, Planets, and Comets.
II. Instruments and Practical Astronomy.
III. The Starry Heavens.
It is intended that each volume shall be paged, indexed, and sold separately. But you will get all three volumes on one disc.
This arrangement, whilst it will be financially more acceptable to the Public, will probably permit in after-years of new editions being brought out at lesser intervals of time than has hitherto been possible.
Subject to the above explanations, it may be further stated that the whole work has been revised everywhere, and enlarged and rearranged wherever alterations seemed necessary or expedient.