Show LL as V E GUINEA PIG AID TO scientists of especial interest to live stock breeders bleeders Bre eders prepared ared by the united states department of 0 agriculture service it may be possible some day for thee the live stock producer to breed his animals in such a way as to speed up the growth of their offspring scientists ot of the united states department of agriculture have accomplished this with guinea pigs and believe the same principles may apply to live stock dr hugh C geneticist ot of the bureau of animal industry and hla his associates observed that inbreed inbreeding in ng and cross breeding of guinea pigs exerted a marked influence on the rapidity or slowness of the growth they are starting new researches to test these scientific principles of inheritance on live stock especially ally swine sheep and cattle it if the live stock breeder could influence the rate of growth of his young farm animals as has been done with guinea pigs he would have control of an important element in the cost of production it Is generally accepted that rapid growth Is economical growth the department scientists obtained various results by cross breeding the members of unrelated families of guinea pigs each of which had been thoroughly inbred when both parents were members of lightweight families tile the offspring grew faster and larger than either parent at the same age when one parent was a lightweight and the other a heavyweight the offspring grew more nearly like ilice the heavyweight parent gaining especially fast in case the mother was the heavyweight the investigators gained no advantage of growth by crossing two heavyweight families but did improve the fertility of the offspring the heaviest family of inbred guinea pigs outgrew all others during their farst four months |