ABSTRACTS. 



339 



The following table gives the resistance offered to phylloxera by 

 various vines, 20 being the highest and 0 the lowest (the most susceptible) . 



Species (Wild Vines) 





Cultivated Varieties and Hybrids 





Vitis rotunclifolia 





Gloire de Montpelier (Riparia) 





V. vulpina (riparia) . 



. 18 



Riparia x Uupestris, 3,300 



. 18 





. 18 



Rupestris Martin 



. 18 



V. Berlaudieri .... 



. 17 



Rupestris St. George 



16 



V. aestivalis .... 



. 16 



Riparia x Solonis, 1,616 . 



16 



V. Labrusca . 



5 



Solonis ..... 



14 



V. californica .... 



. 4 





12 



V. vinifera .... 



. 0 



Isabella 



5 



* Of no use for grafting V. vinifera vars. upon. 



F. J. C. 



Philodendron calophyllum. By Sir J. D. Hooker (Bot. Mag. 

 tab. 7827). — Nat. ord. Aroidcce, tribe Philodendrece. Native of Brazil 

 and Guiana. It is remarkable for the deep brilliant carmine colour of 

 the interior surface of the spathe, which is edged with white. It 

 flowered at Kew in 1901. — G. H. 



Photography, The Importance to the Landscape Gardener. 



By C. C. Schneider {Die Gart. p. 194 ; 25 /1/1902).— The author recom- 

 mends the fixing of beautiful spots in nature of the forest, stream, valley, 

 ■and mountain by photographic sketches, to be imitated or reproduced in 

 parks and gardens. Still better, however, for the experienced landscape 

 gardener is also a good knowledge of drawing or sketching in conjunction 

 with photography. Some artistical sketches are given of a Birch group, 

 with stream ; a corner of the park at Buch, near Berlin ; a cascade in 

 the Thuringian Forest ; and a corner of a Roman ruin in the park at 

 Schonbrunn, near Vienna. — G. B. 



Pickling- Olives. By F. T. Bioletti (U.S.A. Exp. Stn., California, 

 Bull. 137 ; 12/1901). — Experiments on pickling Olives in various ways are 

 detailed in this bulletin. The process recommended is that of steeping 

 the fruits, which should be only just changing colour, in a 2 per cent, 

 solution of potash lye, avoiding any exposure to air during this prelimi- 

 nary process, then placing successively in 2 per cent., 4 per cent., and 

 8 per cent, solutions of brine, allowing each to act for 48 hours to 72 

 hours, and finally storing in barrels filled to the bung with 12 per cent. 

 t>rine. — F. J, C. 



Pine Cone, Morphology of. By H. C. Cowles {Bot. Gaz. xxxiii. 

 No. 2, p. 157; pi. 8). — The author discusses the disputed nature of the 

 so-called carpellary scale and comes to the conclusion it is an outgrowth 

 from the chalaza of the ovule, so that " the microsporangial and mega - 

 sporangial cones are strictly homologous, and in the latter the sporophyll 

 enlarges or remains small just as the chalazal development of the mega- 

 sporangium with a scale is less or more pronounced. — G. H. 



Plant Cytology, Current Problems in. By J. M. Macfarlane 

 Contr. Bot. Lab. Phil, vol.il, No. 2, p. 183 ; 1901).— This address treats 



z 2 



