If we allow 1,000 kilogrammes for the weight of a car that received 360 liters of dry sand or 300 of wet, the performance was 19 per cent., and appeared to be satisfactory, considering the conditions under which the installation was made.

But oil is still being sent to Germany, and during 1916 five hundred reservoirs of oil were sent there, each containing up to 15,000 kilogrammes.

Luggage not exceeding 30 kilogrammes (i.e. 66 lbs.

The men carry the sand upon their heads in small wooden bowls called carumbés, which hold about 15 kilogrammes, and throw it somewhere where the deposit will not interfere with the exploitation.

2. The sulphatization should be operated by five successive solutions of ½ per cent., representing 20 kilogrammes of sulphate of copper per 100 square meters of zinc exposed, or a total of 360 kilogrammes of sulphate for a pile of 150 hectoliters capacity.

One artificial stone of concrete measured 12'9" × 6'7" × 5'7", and was estimated to weigh 25000 kilogrammes.