than any other cause, limits the journeyings of an explorer: the demands
of each fresh chief are an immense drain upon his store.

Summary.--To know the minimum weight for which a proposed expedition must
find means of transport, the omitted figures must be supplied in the
following schedule, the others must be corrected where required, and the
whole must be added together.

Stores for general use:--

Various small stores 95 lbs.
Various heavy stores
Stationery 30
Mapping 31
Natural History (occasional) 30

Stores for Individual use:--

For each white man (at rate of 7 lbs. per month) 66

For each black man (at rate of 3 lbs. per month 30

Presents and articles of payment are usually of far
greater weight than all the above things put together.

TOTAL WEIGHT TO BE CARRIED BY EXPEDITION 282

Mem.--If meat and bread, and the like, have to be carried, a very large
addition of weight must be made to this list, for the weight of a daily
ration varies from 3 lbs., or even 4 lbs., to 2 lbs., according to the