shall certainly attend. Horticultural practice should 

 be made dependant upon ever-varying circumstances." 

 Mr. Belville, of the Royal Observatory, has con- 

 structed the following Table, from a series of observa- 

 tions made with Simmons' hygrometer in connexion 

 with the dew point, as obtained by a Mason's hygro- 

 meter, or a dry and wet thermometer. 



Example: Suppose hygrometer read 45, the mean humidity corresponding 

 is 93. Again, if hygrometer read 90, the mean humidity corresponding is 

 59. 



Mushrooms. (See p. 22.) 



Convenience for growing mushrooms may always 

 be planned in a cucumber house ; and as these excel- 

 lent fungi are universally approved, it may be useful 

 to append an epitome of the mode in which they should 

 be cultivated. 



The best, or, at least, most convenient situation for 

 the bed, would be beneath that provided for the cu- 

 cumber plants (see p. 18). The front may be formed 

 of two course of brick-on-edge, and if divisions are re- 

 quired, they should be formed in the same way. The 

 bottom should be made even, and rendered dry. The 

 material for forming the bed itself consists of short 



