List of cases of Yellow Fever in New Orleans for 1871, continued.

Case 1. On the 4th of August, Charles Collinberg, of Iowa, was taken to the Charity Hospital, where he died the same night of yellow fever, with black vomit.

Investigation of the case furnished the following facts: He came to the city by the way of the river, as flatboatman, about four weeks previously; was homeless, without occupation, slept about the elevator wharf, and drank all the liquors he could pay for, or get upon credit. The night before being taken to the Hospital, he was received upon the floating elevator, as an act of charity, and given sleeping quarters. For not less than four nights previous, he had been sleeping about the bark "Mary Pratt," from Cienfuegos, discharging sugar into the Elevator warehouse. The "Mary Pratt" brought a clean bill of health to the Quarantine Station, and had no sickness on board.

After her arrival in the city, the crew were discharged, the captain took rooms in the city, and only the mate was left on board. At this date her hatches were opened, and whilst discharging cargo, Collinberg slept on board, and was taken sick.

The stevedore's gang, which discharged the cargo, were found to be composed of men long residents of the city, and fully acclimated.

These facts, and the hygienic condition of Collinberg, from his mode of life, probably account for his being the only sufferer from this supposed infectious vessel.

Disinfection by sulphurous acid and chlorine was practiced on the floating elevator, and in the elevator warehouse for several days, and the ship sent to the Quarantine ground, to be disinfected at the discretion of the resident physician. The crew were followed to their boarding house, and their effects thoroughly fumigated and aired.

Permission to take away the sugars stored in the warehouse by St. Louis steamboats was granted, as their own hands rolled out and landed the sugar, and they then went on up the river immediately, thus exposing the city to no danger, and the material feared to be infectious was at once carried to a different climate, where danger was certainly not probable, scarcely possible.

One steamboat made application to take in a cargo of this sugar, and then return to a wharf in the city for twenty-four hours. This permission was not granted.

The history of the "Mary Pratt" in connection with the yellow fever of 1871, will be completed by stating, that on August 10th, she was sent up from the Quarantine Station, and on August 13th, was laid to the wharf, foot of Terpsichore street.

August 23d, George M. Moussé was employed as steward, and began work on board the "Mary Pratt," cleaning up her cabin, reported to be in a very filthy state, but was taken sick with yellow fever on the 29th, was removed to the Hotel Dieu September 4th, and died September 5th. The vessel was again taken in charge by the Sanitary Inspector of the First District, thoroughly fumigated for a number of days, and no unacclimated persons allowed on board.

Unless the case of Hoch, reported further on, had some connection with her, this vessel has no further relation to the yellow fever of this year.

Case 2. August 15th, Mr. John M. Rawlins, Customhouse Inspector, was attacked with yellow fever, and died August 20th, at his residence, 118 Washington street.

Mr. Rawlins was from Alabama, had been a resident of the city ten months. He left the city on duty for the Passes, July 29th; took official charge of the brig "Hope," August 11th' then 11 days from Havana, with no sickness on board.

The " Hope" was detained at the Quarantine Station two days, hatches opened, and enough of the sugar broken out to enable thorough fumigation to be effected of both cargo and hold.

The hammock of Mr. Rawlins was swung near the opened hatches and although warned by the physician as perhaps exposing himself to disease by this proximity, he expressed his entire fearlessness as to the danger, and remained in the position before mentioned.

Less than forty-eight hours after his arrival in the city, and four days after the arrival at the Quarantine Station and opening of the ship's hatches, he was taken ill. The officers and crew of the "Hope" was all acclimated, her cargo went up the river immediately, and within a very few days she was again at sea.

Case 3. The particulars of the case of George Moussé, taken sick on board the "Mary Pratt," have been already given.

Case 4. John Hoch, a tailor by trade, working and residing at 433 Tchoupitoulas street, between Robin and Race streets, first and second streets above Terpsichore street, at the foot of which lay the "Mary Pratt." Hoch had been in the city six months, confined himself entirely to the house and shop, save at evening, at which time the family state, he always went down to the Levee to walk about. No exposure to any infected place could be ascertained.

This case is of interest, from its apparent isolation, and also because later in the season, its vicinity became or proved to be an infected locality.

Case 5. Hon. E. W. Pierce, a member of the Board of Health, was taken ill of yellow fever at his residence, No. 136 Fourth street, September 7th, and died upon the 13th. This was the first case of what might be called the local epidemic of 1871.

The residence of Mr. Pierce was distant about 280 feet from the house in which Mr. Rawlins (case No. 2) died, and in a direction a little to the East of North, diagonally across the block of buildings. The residence of Mr. Rosenberg (case No. 6) the second of this epidemic of the Fourth District, was in the

same line of direction diagonally across another block. The prevailing direction of the winds in July and August is from South to North. Between the residences of cases Nos. 2 and 5, intervened a cottage, but from the gallery of the second story of the house of Mr. Pierce, was a direct and full view, over the cottage, of the house where Mr. Rawlins died.

Just after the death of Mr. Pierce, it was ascertained that two unacclimated children in this same cottage, had been sick just previous to his illness from febrile disorders, called congestion of the brain and intermittent, but a few days later, another child was taken ill in a similar manner and pronounced yellow fever.

As these two cases were not reported, as such, nor submitted to examination, they do not appear in the foregoing table.

It is probable that these were cases of yellow fever, and form the connecting links between the cases of Mr. Rawlins and Mr. Pierce.

By the culpable neglect of the attending physician, information of the occurence of the case of Mr. Rawlins did not reach the Board of Health, until twenty hours after his decease. Measures of disinfection could not be put in operation for some hours later.

It is not supposed that the patient himself breeds the poison, but that he suffers from its presence in that locality, or that he may have brought, by baggage or otherwise, those seeds of the disease, which, finding a congenial soil and climate, multiply and enlarge the circle of poisonous infection in perhaps every direction.

It seems probable that desinfection in the case of Mr. Rawlins came too late, and even though where applied destroying the poison, whether chemical agent, vegetable or animal germinal matter, nevertheless left beyond the circle of its operation, poison or poison producing matter to increase, and assisted by favor ing winds to move forward and cause the other cases, which appeared at somewhat long interval.

As will be seen by the table, cases rapidly increased, and on the 13th, Dr. F. B. Albers, Sanitary Inspector of the Second

District, where occurred the local epidemic of last year, was claced in charge of the infected district.

The Sanitary Police of both the First and Second Districts, reported to him for duty, and the Board of Metropolitan Police cooperated cordially, and detailed as many officers as were required by the Board of Health.

The full particulars of this work and mode of use of disinfedtants are given in the report of Dr. Albers.

The experience derived from the case of Mr. Rawlins led to the more general application of disinfectants.

It was kept clearly in view that though the sick persons were confined to a limited space, yet the poison was of necessity more widely spread.

It is evident that the presence of the poisonous agent must and does precede for some hours, if not days, the attacks of ill

ness.

The peculiar localization of yellow fever, as observed in previous years, and its slow and regular march forward in these localities, suggests that if it be the multiplication and spread of either vegetable or animal life, that agents powerfully inimical thereto, although not able to reach all hidden and closed places, and thus utterly destroy all germs, might at least destroy those likely to be carried about or wafted on, to infect neighboring localities. If the poisonous, or poison causing agent, spread along the ground, it seemed not unreasonable to hope that a powerful agent, like carbolic acid, freely applied to the streets, would prevent its crossing them, and by its vapor rising into the air, as it were, wall in the infected places.

The effect of the thinnest possible film of corrosive sublimate, in preventing insects from crossing into safes and cupboards, is a fact of domestic economy well known. There may be reme dies of analogous action towards the cause of yellow fever.

In the report of last year, it was stated in reference to the cause of the confinement of the fever to certain localities, and its slow progress, that at the date when the disease reached its height, the weather became very cool and dry, and so continted for many weeks.