They were passing Metre 320 on Rack 11.A young Beta Minus mechanic was busy with screw-driver and spanner on the blood-surrogate pump of a passing bottle.The hum of the electric motor deepened by fractions of a tone as he turned the nuts.Down,down……A final twist,a glance at the revolution counter,and he was done.He moved two paces down the line and began the same process on the next pump.
"Reducing the number of revolutions per minute,"Mr Foster explained."The surrogate goes round slower;therefore passes through the lung at longer intervals;therefore gives the embryo less oxygen.Nothing like oxygen-shortage for keeping an embryo below par."Again he rubbed his hands.
"But why do you want to keep the embryo below par?"asked an ingenuous student.
"Ass!"said the Director,breaking a long silence."Hasn't it occurred to you that an Epsilon embryo must have an Epsilon environment as well as an Epsilon heredity?"
It evidentally hadn't occurred to him.He was covered with confusion.
"The lower the caste,"said Mr Foster,"the shorter the oxygen."The first organ affected was the brain.After that the skeleton.At seventy per cent of normal oxygen you got dwarfs.At less than seventy,eyeless monsters.
"Who are no use at all,"concluded Mr Foster.
Whereas(his voice became confidential and eager),if they could discover a technique for shortening the period of maturation,what a triumph,what a benefaction to Society!
"Consider the horse."
They considered it.
Mature at six;the elephant at ten.While at thirteen a man is not yet sexually mature;and is only fully grown at twenty.Hence,of course,that fruit of delayed development,the human intelligence.
"But in Epsilons,"said Mr Foster very justly,"we don't need human intelligence."
Didn't need and didn't get it.But though the Epsilon mind was mature at ten,the Epsilon body was not fit to work till eighteen.Long years of superfluous and wasted immaturity.If the physical development could be speeded up till it was as quick,say,as a cow's,what an enormous saving to the Community!
"Enormous!"murmured the students.Mr Foster's enthusiasm was infectious.
He became rather technical;spoke of the abnormal endocrine co-ordination which made men grow so slowly;postulated a germinal mutation to account for it.Could the effects of this germinal mutation be undone?Could the individual Epsilon embryo be made to revert,by a suitable technique,to the normality of dogs and cows?That was the problem.And it was all but solved.
Pilkington,at Mombasa,had produced individuals who were sexually mature at four and full grown at six and a half.A scientific triumph.But socially useless.Six-year-old men and women were too stupid to do even Epsilon work.And the process was an all-or-nothing one;either you failed to modify at all,or else you modified the whole way.They were still trying to find the ideal compromise between adults of twenty and adults of six.So far without success.Mr Foster sighed and shook his head.
Their wanderings through the crimson twilight had brought them to the neighboorhood of Metre 170 on Rack 9.From this point onwards Rack 9 was enclosed and the bottles performed the remainder of their journey in a kind of tunnel,interrupted here and there by openings two or three metres wide.