GuilHenrde Vriese Protrepticus ad commilitones, Athenaei Illustris Amstelodemensis alumnos, quo scholas botanicas, die Vante idus Octobres, MDCCCXLI, publice instauravit . e thirst of thetourist for mementoes of hazardous ascents. Many of the Alpine plants are quite intolerant of lime saltsand grow best on the granite rocks, but the water supply usedhere is taken directly from the city system and is very richlycharged with these substances, and as a consequence the cul-ture of some of the plants of the higher slopes is impos- 24 BOTANIC GARDENS. sible. This difficulty might only be overcome at


GuilHenrde Vriese Protrepticus ad commilitones, Athenaei Illustris Amstelodemensis alumnos, quo scholas botanicas, die Vante idus Octobres, MDCCCXLI, publice instauravit . e thirst of thetourist for mementoes of hazardous ascents. Many of the Alpine plants are quite intolerant of lime saltsand grow best on the granite rocks, but the water supply usedhere is taken directly from the city system and is very richlycharged with these substances, and as a consequence the cul-ture of some of the plants of the higher slopes is impos- 24 BOTANIC GARDENS. sible. This difficulty might only be overcome at some cost bya system of tanks for the storage of rain water, which wouldfurnish exactly the natural conditions for a large number ofspecies. It is somewhat surprising to learn that in this area of abouttwo thousand square feet more than twelve hundred speciesare successfully cultivated, almost all of which are some places three or even four kinds are grown on a squarefoot of actual surface—a striking example of a form of inten-sive cultivation. It must not be supposed, however, that nonebut Alpine species are grown. A glance at the labels will show. Corner of Lecture Hall ; View from Garden. After a pbotograph. that many are at home far southward in the temperate zone. Itis interesting to note that all of the North American species ofCypripedium are grown here successfully. As a matter of factthe alpinum offers a wider range of conditions than any othermethod of cultivation, and in some form similar to that describedmight offer suitable conditions of growth for species fairly repre-sentative of the flora of a region extending across twenty degreesof latitude. The glass houses are of the usual form, and include a palmhouse two hundred feet in length, to which are attached work-rooms and the herbarium building. The immediate supervisionof the cultural department of the garden is in the hands of thehead gardener, who is provided with a commodious dwelling andoffic


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Keywords: ., bookcentury1800, bookdecade1840, booksubjectbotany, bookyear1841