to the Heating of Pits^ 8^c, 

 Observations taken at 7 a.m. during Dec. 1839 and Jan. 1840. 





Temperature 



Temperature 





Temperature 



Temperature 





in Vinery. 



in open Air. 





in Vinery. 



in open Air. 



1839. Dec. 1. 



60° 



36° 



1840. Jan. 1. 



65° 



38° 



— 2. 



49 



28 



— 2. 



65 



42 



— 3. 



55 



32 



— 3. 



64 



40 



— 4. 



56 



34 



— 4. 



65 



33 



— 5. 



61 



34 



— 5. 



64 



30 



— 6. 



61 



30 



— 6. 



64 



29 



— 7. 



63 



31 



— 7. 



60 



. 24 



— 8. 



61 



28 



— 8. 



66 



32 



— 9. 



62 



32 



— 9. 



66 



34 



— 10. 



64 



34 



— 10. 



64 



29 



— 11. 



61 



32 



— 11. 



61 



39 



— 12. 



64 



40 



— 12. 



66 



42 



— 13. 



66 



41 



— 13. 



65 



44 



— 14. 



65 



40 



— 14. 



63 



38 



— 15. 



60 



38 



— 15. 



65 



44 



— 16. 



62 



36 



— 16. 



65 



40 



— 17. 



65 



34 



— 17. 



64 



34 



— 18. 



63 



34 



— 18. 



65 



33 



— 19. 



65 



37 



— 19. 



65 



40 



— 20. 



65 



45 



— 20. 



60 



34 



— 21. 



68 



47 



— 21. 



64 



41 



— 22. 



61 



46 



— 22. 



60 



35 



— 23. 



69 



45 



— 23. 



61 



46 



— 24. 



65 



42 



— 24. 



68 



30 



— 25. 



60 



38 



— 25. 



64 



34 



— 26. 



55 



28 



— 26. 



62 



38 



— 27. 



63 



30 



— 27. 



61 



31 



— 28. 



63 



27 



— 28. 



62 



32 



— 29. 



62 



28 



— 29. 



60 



32 



— 30. 



64 



26 



— 30. 



60 



31 



— 31. 



65 



45 



— 31. 



60 



34 



On the 16th of Feb. (1840), the following vines were planted 

 in the house, viz. Black Hamburg, White Frontignan, Frank- 

 enthal, Royal Muscadine, Muscat of Alexandria, Black Muscat, 

 and Black Cluster. Early in April gentle heat was applied, 

 and the result already proved is very satisfactory. 



The small pit {fig' 8.) ^ 

 which Mr. White first erect- 

 ed in his garden, and to 

 which a trial of his stove 

 was first applied, had at the 

 period of my visit a plentiful 

 crop of grapes setting well. 

 The pit is 1 ft. long, 6\ ft. 

 wide, and is heated with one 

 of the small patent stoves, placed at the back part of the pit inside, 

 the feeder being on the outside ; the smoke pipe is conveyed under 

 the surface of the soil from the stove to the front of the pit, as 



B 3 



Fig. 8. 



Section and End Elevation of Mr. 

 Vine Pit. 



