BOOK NOTICES. 505 
published seven volumes on forestry, and has some three or four others under 
way. The object aimed at by him is to produce popular technical treatises 
which may be useful to students of forest science, who have not access to the 
works quoted, and to place his readers in a position to work out for themselves 
solutions of the problems raised, should they be so disposed. 
This volume is divided into three parts, viz : I. The Lakes and Rivers of 
Finland with descriptions of the SaimaSea: Boating Adventures on the Ulea 
and the Tornea of the water systems of Finland. II. Forest Economy, with an 
account of the Primitive Treatment of Forests in Finland, including details of 
the practice of " Sartage "or " Svedjande " in Finland and adjacent lands, and 
Forms Assumed by the practice of other lands, followed by several chapters dis- 
cussing the evil«;, merits, demerits and climatic effects of the practice in India, 
France, and Finland ; Development of Modern Forest Economy in Finland ; 
Forest Administration, Protection, and Exploitation; Forests and Forest Trees; 
Disposal of Forest Products, etc. III. Physical Geography, embracing chapters 
upon the Contour of the country, Geology, Fauna, Flora, and CHmate. 
The work is quite comprehensive, as this summary of its scope and contents 
shows, and its author has been very fortunate in reproducing in an attractive 
manner the results of his studies while on a vacation from his ministerial duties 
a few months in the summer of 1879. 
Sea-Sickness: Its Cause, Nature, and Prevention. By Wm. H. Hud- 
son. i6mo., pp. 147. S. E. Cassino & Co, Boston, 1883. 
In this little volume the author presents a method by which, as he claims 
the ocean traveler may secure immunity from sea-sickness without change in diet 
or aid of medicine. He asserts that this terrible affliction to most travelers is 
due wholly to violation of natural laws through ignorance of their true nature 
and that its prevention is possible to all by the use of correct principles, simple 
in themselves and easy in their application. The whole secret seems to be the 
yielding of the body to, instead of resisting, the motions of the vessel ; complete 
relaxation of all the muscles and rehnquishment of will. We, who have lived 
long in this region remember the horseback riding of the Mexican vaqucro, his 
perfect abandonment to the action of the animal; this oh shipboard results in 
perfect avoidance of sea-sickness, if our author is to be believed, and he speaks 
from an experience of thirty-five years. In addition to this the voyager's diet 
should be simple, his habits regular and his conscience as clear as possible. 
Many other suggestions are made, but the above are the principal ones and the 
first is the only one peremptorily insisted upon. The book can be read in an 
hour and it is well worth the attention of all who "go down to the sea in ships." 
