Scientific American Volume 88 Number 16 (April 1903) . to few, if any, of our readers. New Statistics of the Weight of tlie HumanBrain. Prof. Marchand, of Marburg, publishes the statis-tics of the largest number of brain weights so farcollected. His analysis includes 1,169 cases. The av-erage weight of the brain at the birth of a male child,according to Prof. Marchand, is 360 grammes; ofthat of a female child 353 grammes. He concludesthat the lesser weight of a womans brain is not alonedependent on her smaller stature, for a comparisonof both sexes of the same height shows that the malebrain i
Scientific American Volume 88 Number 16 (April 1903) . to few, if any, of our readers. New Statistics of the Weight of tlie HumanBrain. Prof. Marchand, of Marburg, publishes the statis-tics of the largest number of brain weights so farcollected. His analysis includes 1,169 cases. The av-erage weight of the brain at the birth of a male child,according to Prof. Marchand, is 360 grammes; ofthat of a female child 353 grammes. He concludesthat the lesser weight of a womans brain is not alonedependent on her smaller stature, for a comparisonof both sexes of the same height shows that the malebrain is invariably heavier. In a growing child, untilit reaches a height of 70 centimeters, the brain weightincreases proportionately with the body length, re-gardless of age or sex. After this the male brain be-gins to out-strip the fe-rn a 1 e. Themaximumweight is at-tained aboutthe twentiethyear, at whichage that of themale averagesabout 1,400grammes. Thefemale m a x i-mum is usual-ly reachedabout the sev-enteenth year,when the aver-age is 1, Interior Mechanism of the Writer. We give, therefore, in this issue, a brief general de-scription of the mechanism of one of the androids,which description we have succeeded in obtainingfrom their present owner, Mr. Henri Martin, ofDresden, Germany. In the current issue of the Sup-plement will be found a more general descriptionof the androids and of the wonderful feats they per-formed. The mechanism, as shown in the cut, is that of the A new grav-ing dock is tobe built at Bel-fast, Ireland,at a cost of $1,-500,000. It willbe 750 feetlong, 96 feetwide at the en-trance, and 100feet wide atthe depth willbe 32 feet fromthe blocks toordinary high-water level,and some 4feet 6 incheswill be allowedfor the blocks.
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