The latter consideration will for the present exclude electro-motors from competition without taking into account the cost of running such machines by any form of battery now known. Ii motor machines are relied upon for the purpose, they must be of the simplest character, durable and capable of being operated by any one and both constant and uniform in their action. There is a demand for some improvement in the mode of applying power. The slight swaying of the body from side to side, or a rocking motion might be utilized for this purpose, or the weight of the body raised at intervals might be called in, as a sufficient force for the purpose. A small cheap motor would be very useful, but an application of the power of the body in a manner free from the objections of the treadle motion would be better. Since our publication of an article, entitled " The Sewing Machine, its Origin, and Suggestions for its improvement," to be found on page 246, current volume, we notice the subject has been taken up and discussed at length by the press of this city, and a large number oi improvements have been suggested to obviate the use of the feet in driving sewing machines but it should be remembered that it is not the amount but the kind of work performed, that results in injury. It is estimated that over a million sewing machines are now at work in the United States alone, and it has become a fact recognized both in this country and abroad that the prevalence of pallor, lassitude, pain in the back, and leucorrhcea are more prevalent among those who work with sewing machines than among almost any other class of women. The effects produced on the latter class of females by the use of the sewing machine have been thoroughly studied, particularly in Prance, and have been found to comprise a variety of ills peculiar to the sex most employed in such labor, which it is unnecessary to enumerate here. But precisely those who from enfeebled health most need the aid of this invaluable invention, are the ones who are debarred from its use. Women of thiskind can operate a sewing ma-! chine at intervals without discomfort, or may follow it as a business without evil consequences. There are fortunately some American women left whose constitutions have resisted the effects of wrong living and bad dressing.to such an extent that they can sit bolt upright for ?a considerable time without an excruciating pain in the small of the back, or walk a mile or two without being sick a day or two to pay for it.
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