TEMPERATUUE AT CHISWICK. 45 



of the south wall averaged 9° above that of the conservatory, and 

 the minimum 5° lower than that of the latter. From the 1st to 

 the 7th a little fire-heat was supplied at night, as the nights were 

 rather cold. On the 1st the outside borders were mulched with 

 manure, the previous mulching being removed. 8th to 19th the 

 borders and paths were syringed every morning, so as to maintain 

 a rather moist temperature, the berries swelling well. 21st, 

 finished mulching borders inside with rotten manure, giving a plen- 

 tiful supply of water to wash through the manure. 28th, Musca- 

 dines and Muscat JNToir de Jura showing colour. 30th, slight ap- 

 pearance of mildew ; vines, foliage, fruit and all smothered with 

 flour of sulphur. 



August. — The mean maximum temperature in the shade, open 

 air, 71°, minimum 46°. Conservatory maximum 77°, minimum 

 56°. South wall 88°, minimum 52°, the south wall maximum 

 being more than 10° higher than conservatory. There was no 

 fire-heat employed during this month. 



September. — Mean maximum temperature in open air 65°, mini- 

 mum 46°. Conservatory maximum 71°, minimum 54°. South- 

 wall maximum 79°, minimum 51°. The south wall was 8° warmer 

 than the conservatory. Fires were used generally throughout the 

 month. The nights were frequently very cold for the period of the 

 year, and the days were unusually sunless. Towards the middle 

 of the month Hamburghs were cut in quantities, an abundant crop, 

 all well coloured and as black as sloes, a consequence of not 

 meddling much with the foliage after the shoots were once stopped 

 in the early part of the season — after that, merely thinning off 

 laterals and stopping shoots that pushed after the first or princi- 

 pal stopping. Although it was necessary to use fire-heat against 

 the cold at night, it was also necessary to leave air day and night; 

 for otherwise the berries would have become damp and mouldy, 

 owing to the moist unfavourable state of the weather. By air and 

 fire-heat the crop was kept pretty sound, and the foliage was very 

 healthy. 



October.- — The maximum temperature in shade in open airwas59°, 

 minimum 39°. Conservatory maxim um 65°, minimum 50°. South- 

 wall max. 74°, min. 46° ; so that against the south wall the tem- 

 perature was 9° higher than that of the conservatory. Fire-heat 

 was employed at night throughout the month, and occasionally on 

 cold days as well. Notwithstanding cold, wet, sunless weather, 

 the vines produced a good crop, the berries acquired a good size 



vol. ii. r 



