The numerous alterations I have made in this new edition of the ‘Tropical World,’ both by the attentive revision of its former contents, and the addition of new chapters descriptive of the chief characteristics of the various tropical races of man; as well as the care I have taken to condense as much information as possible within narrow limits, will, I hope, justify my assertion that I have done my best to please indulgent readers, and to merit the favourable verdict of severer critics.

Dr. HARTWIG.

Salon Villas, Ludwigsburg (Würtemburg):
March 10, 1873.