GREENHOUSF AND LABORATORY. 23 



Schimper, A. F. W. Pflanzengeographie auf phy>iol<>^i-H-her Grundlage. Jena, 



Gustav Fischer. 1899. 27 marks, unbound. 

 Sorauer, P. A Popular Treatise on the Physiology of Plants. Translated by 



Weiss. London and New York, Longmans, Green & Co., 1895. 53.00. 

 Verworn, M. General Physiology. Translated by Lee. Xe\v York, The Mac- 



millan Co., 1899. $4. 

 Vines, S. H. An Elementary Text-book of Botany. Xe\v York, The Macmillan 



Co., 1898. 52.35, 

 - Lectures on the Physiology of Plants. Cambridge, University Press, 1886. 



2IS. 



(Arthur's "Laboratory Exercises" and MacDougal's " Plant Physiology," cited 

 in the Preface, may be added, but are not regularly listed as published works.) 



3. GREENHOUSE AND LABORATORY. 



It goes without saying that a Greenhouse and a Laboratory 

 are indispensable for a course in Physiology. The more ex- 

 cellently built and equipped these are, the better; but good 

 work depends not upon them and their furnishings so much as 

 upon the spirit of teacher and students. 



The greenhouse and laboratory should adjoin one another, 

 and the ideal place for them, for convenience of heating, care, 

 supply of materials, etc., is in connection with a range of 

 scientific greenhouses in a Botanic Garden. But of course a 

 small greenhouse may be built off a laboratory in an ordinary 

 building, the more especially on a top floor where some angle 

 or flat roof may offer a convenient position. The great requisite 

 in such a house, one indispensable where most of the work is 

 done in winter (as it generally is in this country), is that it shall 

 have full exposure to light without being shaded by neighbor- 

 ing structures for any appreciable part of the day. It is for this 

 reason that Wardian cases built into windows, or larger struc- 

 tures of the same character, while ample for purposes of 

 elementary experimentation in general courses, is insufficient 

 for such a course as this, though a part, perhaps one half, of the 

 course could thus be carried on. A greenhouse built off the 

 laboratory is likely to offer difficulties about heating unless a 

 steam or hot-water system is available, but there are systems 



