When such an act is criminal by reason criminal knowledge or intention. of its being done with a 35. When such an act is criminal by reason of its being done with a criminal knowledge or intention.--Whenever an act, which is criminal only by reason of its being done with a criminal knowledge or intention, is done by several persons, each of such persons who joins in the act with such knowledge or intention is liable for the act in the same manner as if the act were done by him alone with that knowledge or intention. 36. Effect caused partly by act and partly by omission. 36. Effect caused partly by act and partly by omission.--Wherever the causing of a certain effect, or an attempt to cause that effect, by an act or by an omission, is an offence, it is to be understood that the causing of that effect partly by an act and partly by an omission is the same offence. Illustration A intentionally causes Z's death, partly by illegally omitting to give Z food, and party by beating Z. A has committed murder. 37. Co-operation by doing one of several acts constituting an offence. 37. Co-operation by doing one of several acts constituting an offence.--When an offence is committed by means of several acts, whoever intentionally co-operates in the commission of that offence by doing any one of those acts, either singly or jointly with any other person, commits that offence. Illustrations (a) A and B agree to murder Z by severally and at different times giving him small doses of poison. A and B administer the poison according to the agreement with intent to murder Z. Z dies from the effects the several doses of poison so administered to him. Here A and B intentionally co operate in the commission of murder and as each of them does an act by which the death is caused, they are both guilty of the offence though their acts are separate. (b) A and B are joint jailors, and as a prisoner, alternatively for six hours at to cause Z's death, knowingly co-operate illegally omitting, each during the time of such have the charge of Z, a time. A and B, intending in causing that effect by his attendance, to furnish