except a “trembling” in the chest. Advised not to resume work in the caisson. Case 26 – Reardon, England, 38, corpulent. Began work on the morning of May 17, was advised to work only one watch the first day, but, nevertheless, feeling perfectly well after the first watch, went down again in the afternoon.  The pressure at this time was about 35 lbs., the duration of the morning shift 2 1/2 hours, that of the afternoon shift 2 hours.  Immediately after coming up from the second watch Reardon was taken with very severe pain in the stomach, followed by vomiting.  In a few minutes the pain seized upon the legs, which soon lost the power of motion, though the continued to be the seat of extreme pain, and were not entirely insensible to pinching or pricking.  The vomiting continued all night, and toward morning he was removed to the Center Street Hospital, where he gradually sank, and on the 18th died. Case 27 – Patrick McKay, Ireland, 50.  Had been four months at work in the caisson, and had not complained of ill health.  On the 30th of April h remained in the caisson half an hour beyond the usual time, at the second watch the pressure being about 34 lbs.  Some other persons who were with him in the lock, when about leaving, found that he was sitting with his back against the wall of the lock, quite insensible.  He was at once carried up to the surface and removed to the Park Hospital, where I saw him shortly afterwards.  He was there in an unconscious condition; face pale and dusky; lips blue; pulse irregular and feeble. Under the administration of stimulants, he recovered some degree of consciousness and begged incessantly for water. The urine was drawn with a catheter, and found to be intensely aluminous.  Paroxysms of convulsions soon set in, in one of which he died, nine hours after the attack. Case 28 – (Francois) Mirant. Had suffered previously from severe pains in the chest and limbs, which compelled him to give up work. Some time afterward, when the pressure was 4 atmospheres, he resumed work for a single day – the labor being excessively severe. He suffered no inconvenience apparently, however, and after leaving the caisson washed his face and hands as usual.  A moment after he fell senseless, and in 15 minutes was dead. Case 30 – John Myers, aged about 40 years, a native of Germany, of a stout, heavy build, commenced work in the caisson for the first time on the 22nd of April, 1872, the pressure then being about 34lbs to the inch.  He worked during the morning shift of 2.5 hours without inconvenience, and remained about the yard for nearly an hour after coming up.  He then complained of not feeling well and started for his boarding-place, which was but an few rods distant.  As he passed through the lower story of the house, on his way to his own room, which was on second floor, he complained of pain in the abdomen.  While ascending the stairs, and when nearly at the top, he sank down insensible, and was dead before he could be laid upon his bed.