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lu," iII'ethen speculates on the shape of the, teeth as influencisig theif eruptii ,and appears'toregard theprocws of dentition as being, for the most part, a mechanical one. Probably this theory was rather generally held a short time ago: the tooth was on the,wrong side of a tough gum, thrgh h which the surgeon must help it with his lancet. Zyon at the present day, the public mind associates dentition with a certain amount of clumsiness or cruelty., How often, does one hear such an expression as this: "My children always cut their teeth with djsrhea, or a large head." Was not the realiexplanation of a11 this gually to be found in the fact of the child being improperly fed? The obscure troubles often come on just as the infant is ;being weaned; and, from what I know on the matter of dieting at about this period, I should be inclined to think that the source of irritation is much more likely to be in the alimentary canal than in the ums;. That a slight loss of blkod from scarification of the gums might even in that caMe give relief, I am willing to admit; but I think* that the saddle qsst often have been put or_ the wrong horse. How have the public become possessed of the -questionable pathology and how much truth wathere in the theory? To compare the practice of lancing the infant's gum with that of oStting through a fibrous bsd or roll of mucous membrane. which is preventing the complete emergence of the wisdom tooth of, the adult, is not, I think, quite fair. It 1has been remarked tou me that it in strange that the molar teeth of the child do not demand help from the lancet; and that the sharp edged teeth, the incisors, are those which are supposed to stand most in need of help. This fact is sug..gtive.. ,JDr. Billard remarked that,, if all that authors had written on the aberration of the process of dentition should be recorded, an extended Amapter of absurdities would be the result. And, quoting Guersant, he says, "most of the diseases of infamcy 'have been attributed to Wathing. The difficulty of tn accurate observation of diseases at this ewly age, and the little positive knowledge we possess in this departmwnt of pathology, have contributed greatly-to the. establishment of -this opinion." (Diseses ofInfants, 1839, p. 201). There is one special trouble which is apt to be associated with dentition, though not dependent upon it, and which is very apt to be overlooked by the practitiQner who is inclined to regard the eruption of the teeth as a morbid process; that is, the early stage of infantile paralysis. I would not pretend that one should be able to foretell the on.-coming of the paralysis, when summoned to attend a young child with obscure feverish symptoms; but what I would venture strongly to urge is, that one should not content oneself with the suggestion that probably all the symptoms are due to the teething. On several occasions when I have been consulted with regard to the later stages of that disease-the wasted or deformed limbs-I have heard the mother remark reproachfully, if not bitterly, that the doctor assured her that that illness, of many months ago, was but the effect of the 'tething. I would repeat that dentition is almost 'invariably a simple physdiological process. I would submit that, of the many ills to which tender flesh is heir, few, arise from teething, though naturally they .atcompany it. I would offer a caution, that a careful look-out be kept for one of the most insidious of these ills-essential paralysis. Then, as regards the gum itself: what is the exact condition which demands scarification ? When the alveolus is expanding, the tooth lr6Wing, and the enamel advancing, the gum must needs be fibrous -and tough; but that it is not really inflamed is evident to the sight, -mit is also from the fact that the infant delights in having it pressed -and rubbed. Does one often find it red and swollen from inflammaktio t For years, I have carried a lancet in my card-case, but I find ,no work for it uponthe gums. Doubtless there are gums in need of searification. Who sees them ? Who lances them? Do the physi. -Qiaiis? What have the family. medical attendants to say upon the xubject? Is lancing the gums much employed at the present day; is it littleemployed; is it ' a good remedy out of fashion ," or do the rising generation suffer as little from its rather general disregard as tky do from the increasing neglect of James's powder? 'lAt the end of the chapter on " Teething," Combe advises that, when Atre is much local or constitutional disturbance, the gum should be 4tarified with a lancet, and allowed to bleed freely, though not in the expeotation of the tooth immediately following; and that in the second stage, when the tooth is about to appear, the lancing may be demanded for putting an end to suffering and averting danger. I -would ask, in conclusion, if this local and constitutional disturbance, resulting from dentition, is often met with now-a-days ; and what are the " dangers that are to be so averted ? Last of all, I would like to hear from the dental surgeon' as to what might probably have been ti effect upon the development of the permanent teeth of the once widely spread practice of lancing the gums. REMARKS ON PARACENTEEIS A.1D ASPIRATION: A NEWT ASPIRA1Y6t-, MND A KNIFE ESPECIALLY AD4PTED 'FOR TUE OPER4TIO(M OF INCISION'. OF THE CREST.

Remarks on Paracentesis and Aspiration: A New Aspirator, and a Knife Especially Adapted for the Operation of Incision of the Chest