Catalogue of Works on Gardening, Sfc. 321 



alternate action of heat and cold. Consequently, when the atmosphere which 

 surrounds the plant is at a higher degree of temperature than the soil in which 

 the roots are, then, of course, the sap is ascending. Likewise, when the soil in 

 which the roots are is at a higher degree of temperature than the atmosphere 

 which surrounds the plant, then the sap is in a descending motion. Now, I am 

 satisfied that it is from this descending current of the sap that the tuber or 

 potato receives its nourishment, and not immediately from the fibres, or the 

 soil. This is seen, for instance, by cutting off the tops of the potatoes just 

 below the surface: the consequence is, that the tubers will not grow any 

 more ; therefore no potatoes ought to be suffered to remain in the ground 

 after the tops are decayed, or cut down by the frost." (p. 13.) 



Mr. Stent finds this mode of treatment to produce one fourth 

 part more of crop than the old mode. He states this, not only 

 from his own experience, the details of which he has given, but 

 on that of a friend, a farmer, who has cultivated potatoes for 

 the market for the last twenty years. We recommend the 

 pamphlet to such of our readers as cultivate the potato ejiten- 

 sively ; though we regret that the price is so high as 2s. 6(1. for 

 only nineteen widely printed pages of large type, and a very 

 indifferent woodcut. 



Art. V. Catalogue of Works on Gardening, Agriadture, Botany, 

 Rural ArcJiitecture, S^c, lateli/ published ; with some Account of 

 those considered the more interesting. 



Proceedings of the Fifth Meeting of the British Association for 



the Advancemeiit of Science, held in Dublin, during the Week 



from the lOth to the I 5th of August, 1835, inclusive ; with a7i 



alphabetical List of the Members enrolled in Dublin. 4to, 129 



pages. Various plates and woodcuts. Dublin, 1835. 



This, from the preface, appears to be the production of Philip 

 Dixon Hardy, a printer in Dublin, and the conductor of that 

 deservedly popular journal, the Dublin Penny Magazine. The 

 volume is very neatly got up; and, considering the mass of matter, 

 and the numl)er of engravings and woodcuts, it is very cheap. 

 We were anxious to see it, chiefly on account of a paper by Dr. 

 Alman, " On a Natural Arrangement of Plants according to the 

 Natural System ;" but the doctor's system does not appear to 

 us to be sufficiently developed to be applied either in a garden 

 or in a herbarium. Mr. Niven's plan (of which an account is 

 given in this Magazine, Vol. XII. p. 116.) is noticed in p. 19. 

 of the book before us, and Dr. Alman's in p. 60. ; a plan of the 

 latter being given in the Appendix, No. 2. We should like 

 much to see a plan of this kind given in such detail as to render 

 it suitable to be carried into effect on a large scale, or even in a 

 small garden, where the groups might be separated by gravel 

 walks and box edgings ; or, as we think would be better, by 

 walks paved with clinkers, with edgings of brick, stone, or slate. 



Vol. XIII. — No. 88. y 



