90 THE BOOK OF THE ROSE CHAP. 
Rose are there given in a table from Wolff’s Aschen 
Analysen, Berlin, 1871, 1880, as follows :— 
& 
ar 3s | . a : "A. za : I 
Ss) oata \epnle.|.s | 2 eae 
s) Oo | «aA pa : a =) =| a 
Ay 7) | = c=) Ay mM 72) (Ss) 
} | 
TROOLS Es ctiecesres paces 13°45 | 4°20 | 40°88 | 7:15] 2°86) 29°14] 1°95) O21) O21 
WiGOG recess ressvucssera 14°25 | 2°57 | 51:50| 7°62) 4°28|10°62| 2°22) 4°35) 2°78 
pases ae 
Leaves .......00e006.| 33°13 | 1°47 | 81°29) 9°23| 2°49/11°68} 4°31] 5°71) 0°89 
| 
FIOWECYS....00....2..5.| 47°41 | 2°44 | 13°25| 5°94] 0°97] 28°46| 3°17| 1°52] 0°57 
On reasoning from this to get a proper chemical 
manure for Roses, the first thing to remember is 
that there is one most important item not found in 
ash analysis, and that is nitrogen, for which in a 
chemical formula the uninitiated must look for the 
words ‘‘nitrate’’ or ‘‘ammonia.” Nitrogen is the 
stimulant which gives lfe to the whole, like a 
spark of fire which gives such mighty power to the 
loaded cannon, or (to use more humble imagery) a 
penny in the slot which sets the whole elaborated 
machinery in motion. Mere nitrates, such as 
nitrate of soda, show immediate and wonderful 
results on unexhausted land, when all the plant 
wants is a start; but it is ike drawing a cheque 
upon a bank, a capital way of supplying the needful 
as long as the bank is replenished accordingly, 
but otherwise not a mode of raising money likely 
to be successful for long; so the nitrate makes the 
mineral stores (such as potash and phosphates) 
available if they be there, but cannot replace them. 
