30 Forestry Quarterly 



against 250,000 cu. m. from the United States, Canadian ex- 

 ports to Germany being still quite small. Part II recites the 

 results of the plantation experiments, rather too briefly to be of 

 much value, and Part III gives the silvicultural characteristics 

 and treatment supposed to be desirable. We note only in- 

 cidentally such erroneous statements as the one regarding Betula 

 leiita, which is said to be " in other respects very much like the 

 European birches " — we do not know in which respect it re- 

 sembles them except the fruit — and the statement, that Carya 

 alba requires the climate of the Silver Fir, which is most ques- 

 tionable from its distribution at home. 



In retrospect there are enumerated as valuable acquisitions for 

 European forestry Robinia, Pinus Strobus and Banksiana, and 

 Pseudotsiiga. Next come hickory and walnut. Other congeners 

 of firs, pines, ashes, oak may turn out useful for silvicultural 

 reasons in those parts where such congeners do not exist, but 

 appear superfluous elsewhere. Generall}^ speaking the immunity 

 from frost of the East American and of the Rocky Mountain 

 species is noted, while the Pacific Coast species are sensitive ; 

 the latter more rapid in growth. The planting of European 

 varieties in East America, the writer ventures to assert, is only 

 likely to promise success in the British section (Canada) but it 

 would be quite superfluous as the closely related species in those 

 parts already fulfil their purpose. It would be a pity if this 

 ipse dixit were to be taken as in any way authoritative, and pre- 

 vent further inquiry and experiment in that direction. Judging 

 from the actions of the Canadian government it has not yet sub- 

 scribed to this dictum, finding Riga Pine and Norway Spruce 

 worthy of recognition in their plant distribution. 



There are other interesting points which the reader would find 

 desirable addition to his knowledge on the use of exotics. 



B. E. F. 



A Hand-book of the Trees of California. By Alice Eastwood. 

 Occasional Papers of the California Academy of Sciences IX. 

 San Francisco, 1905. 86 pp. 12 mo. 



This neat, handy volume bound in flexible covers and generally 

 in elegant dress fills a most decided want for a short booklet for 

 identification of the California arborescent flora ; and it does so 

 most efficiently through brief and clear, non-technical, but, for 



