appear in a clearer light, which the author, by aid of original 
papers and manuscripts, has been enabled to throw upon them. 
These documents are now published, or brought together and 
annotated, for the first time. 
The Genus Iris. By William Rickatson Dykes. With Forty- 
eight Colored Plates and Thirty Line Drawings in the Text. 
254 pages, demi folio, half morocco; $37.50, postpaid $38.36 
This elaborate and artistic volume brings together the avail- 
able information on all the known species of Iris. The account 
of each includes references to it in botanical literature and a 
full description of the plant, together with observations on its 
peculiarities, its position in the genus, its value as a garden 
plant, and its cultivation. As far as possible the account of the 
distribution of each species is based on the results of research in 
the herbaria of Kew, the British Museum, the Botanic Gardens 
of Oxford, Cambridge, Berlin, Paris, Vienna, and St. Petersburg, 
and the United States National Museum at Washington. 
The most striking feature of the book is the forty-eight life- 
size colored plates, reproduced from originals drawn from living 
plants—making it a volume of great beauty as well as of scientific 
importance. 
Byzantine and Romanesque Architecture. By Thomas Graham 
Jackson, R.A. Two Volumes, with 165 Plates and 148 Illustra- 
tions, : 
Vols. I and II, each 294 pages, crown quarto, half vellum; two vols. $12.50, postpaid $13.25 
This work contains an account of the development in Eastern 
and Western Europe of Post-Roman architecture from the fourth 
to the twelfth century. It attempts not merely to describe the 
architecture, but to explain it by the social and political history 
of the time. The description of the churches of Constantinople 
and Salonica, which have a special interest at this time, is fol- 
lowed by an account of Italo-Byzantine work at Ravenna and in 
the Exarchate, and of the Romanesque styles of Germany, 
France, and England. Most of the illustrations are from 
drawings by either the author or his son, and add great artistic 
value to the volumes. 
The Duab of Turkestan. A Physiographic Sketch and Account of 
Some Travels. By W. Rickmer Rickmers. With 207 Maps, 
Diagrams, and Other. Illustrations. 
580 pages, royal 8vo, cloth; $9.00, postpaid $9.44 . 
A record of exploration of a little-known region, combined 
with some elementary physiography. The book discusses the 
3 
