Object StatementBirth control calculator, 'Rythmeter', in kit complete with instruction booklet, paper/cardboard, produced by Gilmore Lee Tilbrook, designed by Major Tilbrook, Rythmeter Company, United States of America, 1945
Physical DescriptionBirth control calculator, 'Rythmeter' in kit complete with instruction booklet, paper/cardboard, invented by [Major] Gilmore Lee Tilbrook, Rythmeter Company, USA, 1945.
The 'Rythmeter' kit includes a (-1)cardboard gauge rather like a circular slide rule, in a (-2)buff coloured paper sleeve, and an (-3)instruction booklet with a dark blue cover. Both pieces come in a (-4)buff and orange cardboard envelope, with product information and testimonials from medical and religious authorities. The calculator and instruction book are to assist in calculating a woman's fertile period for use in family planning by the rhythm method.
Marks(-1)'MADE IN U.S.A.' printed on obverse of Rythmeter. Reverse of Rythmeter printed with the following information,on the bottom, 'RYTHMETER CO., P.O. BOX 8646, WILKINSBURG, PA. PROCE - DELUXE MODEL - SIX DOLLARS / COPYRIGHT 1944 BY GILMORE LEE TILBROOK. Copyright under International Copyright Convention. Copyright under Pan American Copyright Convention.'