The circumstance which presses with the greatest weight 
on the British planters in the West Indies is that branch of 
the monopoly which, reserving for the manufacturers of 
Great Britain all such improvements as the colonial produce 
is capable of receiving beyond its raw state, or first stage of 
manufacture, prohibits the colonists from refining their 
great staple commodity, sugar, for exportation. This is 
effected by a heavy duty of £4. 18s. 8d. the cwt. on all 
refined or loaf sugar imported, while raw or Muscovado 
sugar pays only 15s. the cwt. This difference operates (as 
it was intended) as a complete prohibition. 
The quantity of raw or Muscovado sugar imported into 
Great Britain on an average of four years (1787 to 1790) 
was somewhat more than 140,000 hogsheads of 14 cwt. 
each at King’s Beam. The drainage at sea amounted to 
280.000 cwts., being in value £500,000 sterling. Such is 
the loss to the public. And let it be remembered that this 
loss is not merely contingent or possible, but plain, positive, 
and certain ; it being undeniably true that 280,000 cwt., or 
14.000 tons of sugar were sunk in the sea in the transporta- 
tion of 140,000 hogsheads of the raw commodity as that 
this number was imported into Great Britain; and it is 
equally certain that every ounce of it would have been 
saved if the planters had been permitted to refine the com- 
modity in the colonies. The consequent loss to the revenue 
is easily calculated : 64 gallons of molasses will produce 
40 gallons of rum Jamaica proof. 
“ On the Inverse or Inductive Logical Problem,” by Pro- 
fessor W. S. Jevons, M.A. 
Logical deduction consists in ascertaining from a law or 
laws the combinations of qualities which may exist under 
those conditions. The natural law that all metals are con- 
ductors of electricity really means that in nature we may 
find three classes of objects, namely, 
