With the hope of obtaining information upon this point, the writer addressed inquiries to various individuals, who would be likely to have the desired knowledge. Only a few answers to his inquiries have been received up to the present writing; more are promised by and by. The subject is a delicate and difficult one to investigate. The reports of committees and examining boards, of ministers of instruction, and other officials, throw little or no light upon it. The matter belongs so much to the domestic economy of the household and school, that it is not easy to learn much that is definite about it except by personal inspection and inquiry. The little information that has been received, however, is important. It indicates, if it does not demonstrate, an essential difference between the regimen or organization, using these terms in their broadest sense, of female education in America and in Europe. Dr. H. Hagen, an eminent physician and naturalist of Koenigsburg, Prussia, now connected with the Museum of Comparative Zoology at Cambridge, writes from Germany, where he has been lately, in reply to these inquiries, as follows:-- NUREMBERG, July 23, 1873. DEAR SIR,--The information, given by two prominent physicians in Berlin, in answer to the questions in your letter, is mostly of a negative character. I believe them to prove that generally girls here are doing very well as to the catamenial function. First, most of the girls in North Germany begin this function in the fifteenth year, or even later; of course some few sooner, even in the twelfth year or before; but the rule is after the fifteenth year. Now, nearly all leave the school in the fifteenth year, and then follow some lectures given at home at leisure. The school-girls are of course rarely troubled by the periodical function. There is an established kind of tradition giving the rule for the regimen during the catamenial period: this regimen goes from mother to daughter, and the advice of physicians is seldom asked for with regard to it. As a rule, the greatest care is taken to avoid any cold or exposure at this time. If the girls are still school-girls, they go to school, study and write as at other times, _provided the function is normally performed_. School-girls never ride in Germany, nor are they invited to parties or to dancing-parties. All this comes after the school. And even then care is taken to _stay at home when the periodical function is present_.