70 On the Inorganic Constituents of Plants, 



to 10000. One thousand seeds weighed 610 grains. The standard 

 measure full weighed 4023 grains ; hence the bushel would weigh 

 57^ lbs. The plants in this, like those in the preceding square, 

 were remarkable for their size and the deep green colour of their 

 blades. They were rather stiffer and therefore less laid than those 

 in No. 7. 



9. Phosphate of Lime. The Phosphate employed was nearly 

 pure, it was prepared from the super-phosphate of Lime formed 

 by acting on Bone-ash by Sulphuric Acid. The ground was 

 manured with it at the rate of 4^ cwt. per acre. The produce 



The proportion of grain to the whole crop therefore was as 

 2123 to 10000. One thousand seeds weighed 628 grains. The 

 standard measure full weighed 4166, hence the bushel would 

 weigh 59j lbs. The plants in this and the following square were 

 rather poor, and somewhat paler in colour than those in the 

 standard square 13. 



10. Phosphate of Lime and Silicate of Potash. Manured with 

 these substances at the rate of 4^ cwt. of the former, and lj cwt. 

 of the latter per acre. The produce was 



The proportion of grain to the whole crop therefore was as 

 2076 to 10000. One thousand seeds weighed 585 grains. The 

 standard measure full weighed 4015 grains, hence the bushel 

 would weigh 57^ lbs. 



11. Muriate of Potash. This Salt was applied at the rate of 

 3 cwt. per acre ; it was nearly pure, and cost 18*. per cwt. There 

 is however an impure Muriate of Potash known in trade under the 



