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BOLUS (H.) ICONES ORCHIDEARUM AUSTRO AFRICANARUM EXTRA TROPICARUM,; or figures with 
desc — ons of extra tropical South African orchids, Vol. 1, with roo colored and plain plates, 8vo, cloth, 1893- 
96, 
JACKSON (B.) GUIDE TO THE LITERATURE OF BOTANY, including nearly 6,000 titles not given in Pritzels’ 
Thesaurus, 4to, cloth, 1881, £1. 
hensive subject-index, 4to, cloth, 1882, 1 
MILLS -. ‘! tg R. Pennine DIATOMACEAE OF THE HULL DISTRICT with illustrations of 600 species, 
s, 8vo, 1 
gaa s ‘oncmp GU ei. 
with the name 
goatielye tos 6d. 
SIM ) oe ERNS OF SOUTH AFRICA, 
outh Priva with localities, cultural notes, etc., 
VAN nEURCK (H ON THE D 
e history, piri a cult eas 
sane enus, as well a 
it, Translated by W. 
containing al] t 
roan, 
escri — n and figure of e 
E. aan 
rig wie a and place: 
. Babingto: 
- Newbould, the figures b 
i 0, | half morocco, 7 gay 
y J.deC 
, £57 15S. 
OLOGY, a iis wales towards a bibliography of economic botany, with a compre- 
e best known species, v . 
s and parentage of all the known hybrid orchids = i“ i pag I, IQOT, roy. ag ‘hall 
containing descriptions and figures of the tee and fern allies 
, with 159 plates, 8vo, half bound, 1892, £1 
roduc 
and see ol ag of diatoms, and a description and figure 
r, 36 plates and engra 
FOR SALE 
SOWERBY (J.) and J. BE. SMI Seni pace BOTANY ; 
of — with gencral inkese s jen 
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hi absolutely periett copy ending with plate 2,998 (the last published) 
varietie 
tory remarks on the structure, 
typical of every 
a be ag found in the North Sea and countries Anal hei 
s (2,000 figur a 8vo, cloth, 1896, £2. 
E, containing intr 
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vols.) by W. Borrer, 
Tr, 2,998 colored plates, 41 vols. roy. 
erby and J. Salter 
WILLIAM WESLEY & SON, BOOKSELLERS AND PUBLISHERS 
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Strand, London 
Light Waves and 
Cheir Uses 
Eight Lectures Delivered Before the 
owell Institute in 1899 
oe by 108 Text isc 
2 Colored Plates 
By AL canis A. “be Smee 
ieee: and Head of the Department of Physics 
Director of Setcaa Physical rohan ory 
Issued as Volume Ill 
Series of the Dec 
the University of Chica ago, pp. xii+164, 
8vo, cloth, net, $2.00; Postpaid, $2.15 
he Second 
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