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Manual on the laws of family purity in Hebrew with points by R. Jehiel Michel Tykocinski. There is an introduction followed by the text. The subject matter being: Niddah; wearing white garments; seven clean days; shampooing; tevillah; laws pertaining to a bride; childbirth; separation; and marital duties close to a woman’s period.
R. Jehiel Michel Tykocinski (1872–1955), rabbi and author. R. Tykocinski was born in Lyakhovichi, Belorussia. Orphaned of his father while still young, he was taken to Erez Israel in 1882. He studied under R. Samuel Salant , whose granddaughter he married in 1890. In 1900 he began to take part in the administration of Ez Hayyim in Jerusalem, at first as head of the junior department and then as chief administrator. He contributed greatly to the development of the institution – both when it was in the Old City of Jerusalem, and later when it moved outside. He was also active in the foundation of new suburbs in Jerusalem, and favored the unification of all sections of the Jewish population, new and old.

R. Tykocinski specialized in the laws and customs pertaining to Erez Israel, and from 1904 onward published an annual Lu'ah ("calendar") detailing liturgical and other customs for the whole year. This calendar was accepted as the authoritative guide for the liturgical and synagogal customs of the Ashkenazim in Israel; it continued to appear under the editorship of his son even after his death.

R. Tykocinski devoted himself especially to halakhic problems connected with astronomy, in which field he published Tekufat ha-?amah u-Virkatah (1924); Bein ha-Shemashot (1929); and Sefer ha-Yomam (1943), on the international date line. His other works are Tohorat Yisrael (1906); Ha-Ishah al pi Hukkat Yisrael (1920); Hilkhot Shevi'it (1910) and Sefer ha-Shemittah on the laws of the Sabbatical Year; Gesher ha-hayyim (1947, 19602) on the laws of mourning; and Sefer EreZ Yisrael (1955) on the laws and customs appertaining to Erez Israel. He also published many articles in various journals and left behind in manuscript novellae on the Talmud and responsa.

Family purity (Taharat (Tohorat) ha-Mishpahah, the term popularly given to the laws of niddah, which involve a married couple's abstinence from sexual relations during the period of menstruation until the wife's immersion in the mikveh. These regulations are considered by the Orthodox to be basic to the Jewish way of life and R. Akiva went so far as to declare the son of a niddah a mamzer (Yev. 29b). Although his viewpoint is not accepted as the halakhah, it nevertheless indicates the importance of these laws. In more modern times, many psychological, medical, and physiological reasons have been given for the observance of this precept, and all of them stress the benefits that are gained by the couple practicing abstinence during part of each month. Societies have been organized in many communities for the purpose of instructing people in these laws and supervising the daily functioning of the mikveh.