4. EXOTIC BOTANY, or Coloured Figures of new, beauiiful and rare 
Exotic Plants. No. 1 to 24j 4 to, at 5s. per Number. Svo, at 2?. 6i. each 
Number. 
5. CRYSTALLOGRAPHY; Parts I and II, with Models, 105. 6d. each ; 
without Models, is. each — Intended to explain the Nature of the Crystal- 
lization of different Mineral Substances. The First Part on Coals, the 
Second on Diamond. 
6. ENGLISH FUNGI, or Coloured Figures of English Fungi or Mush- 
rooms. By James Sovverby, F. L. S. &c. In 28 Numbers, loZ. 6s. 6d. 
No- 28 being the First of the Supplement, of which the Second is in the Press, 
and will be published July 1, I8O9. 
7. A New Edition of A BOTANICAL DRAWING-BOOK; containing 
Ten Plates, with Instructions from the simplest Beginning to the highest 
Finishing ; with a concise Description of Transparent and Opaque or Body 
Colours, kc. Price \0s. 6d. 
8. THREE TRIANGLES of YELLOW, RED, and BLUE, each softened 
from Light to Full Yellow, Red, and Bhie, being the proper Primitives, may be 
passed over each other to show the Binaries and Ternaries very distinctly : 
thus showing all possible Mixtures from Light to Dark. 35. the Set. 
The same in Squares at the same Price, or both Sets, 5s. — See Note, 
page 46. Plate 7, or Chromatometer, may be had separate, to be used as de- 
scribed, at 25. 6d. 
As some may desire to attend Mr. S.'s Lecture on this subject on the 
enlarged scale, by which it may be understood more easily, he intends to keep 
the Apparatus some time longer ; and those desirous, on sending their address, 
will be informed of the earliest Lecture. Private families, or a few friends, may 
be accommodated at their own time, at five guineas the party, not exceeding 12 
persons, by giving due notice. 
*^* Mr. SOWERBY has, in the above Works, endeavoured at filling 
up some of the desiderata of British information with the best intent. Their 
utility is sufficiently evinced by the publicity they have obtained without the 
usual aid of continual advertisement. 
PRINTED BY RICHARD TAYLOR AND CO. 
SHOE lANE, LONDON, 
