509.120. All averments of claim or defense shall be made innumbered paragraphs, the contents of each of which shall belimited as far as practicable to a statement of a single set ofcircumstances; and a paragraph may be referred to by number inall succeeding pleadings. Each claim founded upon a separatetransaction or occurrence and each defense other than denialsshall be stated in a separate count or defense whenever aseparation facilitates the clear presentation of the matters setforth.
(L. 1943 p. 353 ยง 43)