198 
On Teynporarij Tile- Kilns. 
Fig. 18. The caterpillar -which spins the web. 
Fig. 19. The chrysalis or pii])a. 
Fig. 20. Ca/limome Dated, male. 
Fig. 21.* The female magnitied. 
Fig. 22. A leaf blistered by Tephritis Onopordinis. 
Fig. 23. The mining maggot under the skin. 
Fig. 24. The maggot taken out. 
Fig. 25.* The same magnified. 
Fig. 26. The pupa. 
Fig. 27.* The same magnified. 
Fig. 28. The female fly Tephritis Onopordinis v^zXkmg. 
Fig. 29.* The male flying and magnified. 
Obs. — Those numbers with a * attached refer to the objects which 
are represented larger than life, and all the figures are drawn from 
nature. 
(The Copyright of this Paper is reserved to the Writer.) 
Hayes, near Uxhridge, May, 1848. 
VIII. — On Temporary Tile-Kilns. By Th. Law Hodges, M.P. 
To Mr. Pusey. 
My dear Sir, — The experience of four years, that have elapsed 
since the date of my letter to the late Earl Spencer, published in 
the fifth volume of the ' Proceedings of the Royal Agricultural 
Society,' p. 551, has thoroughly tested the merits of the temporary 
clay-kiln for the burning of draining-pipes described in that letter. 
I am well aware that there were persons, even among those who 
came to see it, who pronounced at once upon the construction 
and duration of the kiln as unworthy of attention. How far their 
expectations have been realised, and what value belongs to their 
judgment, the following short statement will exhibit : — 
The kiln in question was constructed in June, 1844, at a cost 
under 5/. 
It was used four times in that year, burning each time between 
18,000 and 19,000 draining pipes of l|-inch diameter. 
In 1845 it was used nine limes, or about once a fortnight, 
burning each time the same quantity of nearly 19,000 pipes. 
In 1S46, the same results. 
In 1847 it was used twelve times, always burning the same 
quantity. In the course of last year a trifling repair in the bot- 
tom of the kiln, costing rather less than 10s., was necessary, and 
this is the only cost lor repair since its erection. It is now as 
good as ever, and will be worked at least once a fortnight through 
the ensuing season, . . ' 
