5 9 0 D O C U M E N T 3 9 6 C A L C U L A T I O N S 396. Calculations [ca. 3 February 1929] [1] a  A i   i/ a  A i   /i – a  A i  i   / – = a  i A i a  A /i i +   / a  i  i  i  –A a  i A i a  A /i i +   / a  i  A i a  i A / i a   A / i a  A /i/ i + + + a  i  A i a  A /i/ i + a   A i  i  – a  A i  i    / – = a  i     i  –a = V l/   l   / – V l/l  V      – 0 = V l/l/  1 2 V         – 0  h   h           –  +    V      V             –   h             –   – + 1 h --V        –      + h h       –                – + +   + V        V     V   – h     – h     + +   V      2  V   – 2h     – 2h       – 2h    +   1 2 – 1 2 – 1 2 – V l/l  1 2 + V          0  2h        –     +  + G  V      1 2 --V      – +    / 0. 