stellar spectrum data in his harvard lab, and he hired only women, including his own maid, wilhelmina fleming. and he didn't do this because of some particular interest in the female mind, or some desire to nurture women in his life. he did it because he had a lot of data to process and he needed to employ twice as many workers to comb through it all. women were paid half as much so he could get more for his buck. but the harvard computers, who are unfortunately known to history as pickering's harem, -- and his maid discovered the horsehead nebula. in her colleague, who has one of the coolest names in the history of science, could classify at a rate of three stars per minute. they mapped the cosmos. but their were equivalent to the wages of unskilled workers, between $.25 and $.50 an hour, which is more than a factory worker but less than a clerical worker. as the historian navin allen greer writes, women like these were not the intelligent workers of sympathetic men, they were werers, desk laborers, who earning their way for their skills at numbers. that might have been common in the 19th ce