also their sudden death are numerous, and not well understood and any one of these influences may disturb the life cycle of the plant and cause death and decay.

Lake Maurepas is a shallow basin, banks and bottom covered with decomposed organic matter, with very little current and no tide.

Lake Pontchartrain is a larger body with slightly more current practically the same conditions of banks and bottom. Until within the last ten or eleven years crevasses occurred in the East bank of the Mississippi which flowed through Lakes Maurepas and Pontchartrain into the Gulf at rather frequent intervals, renewing the water and thoroughly washing out these basins. It may be that the absence of these crevasse waters has permitted an amount of organic contamina tion to occur favorable to the growth of the algae; at any rate it is probable that a crevasse might relieve the situation for several years to

come.

There are two bad conditions possible and often present in Lake Pontchartrain, one is the condition produced by the algae, and the other is the local condition covering an area possibly ten miles long and two miles wide, in the vicinity of New Orleans, produced by the emptying of sewage and drainage into the Lake from that City.

It will be seen by reference to the table of analyses, that all of these waters contain an unusually large amount of organic matter; con sequently are peculiarly liable to become offensive, when any extra burden is thrust upon them, such as the decay of algae in large num bers, or the disposal of sewerage. This seems to have been shown by the conditions at West End and vicinity last fall, where the nuisance was greater than at any other part of the Lake where the algae died in numbers sufficient to cause trouble.

The local conditions produced by the sewage and drainage canals. can be relieved by carrying out the original plan to eitner divert the drainage and sewage waters into Lake Borgne or into the Mississippi

The conditions produced by the sewage and drainage canals of New Orleans are constantly manifest, while conditions brought about by the death and decay of the algae occur from time to time, and are of transient character.

Recommendations are treatment of patches of anabena or other

varieties of blue-green algae with copper sulphate wherever found, as early in the Spring as possible. And it is further recommended that the sewage and drainage from the City of New Orleans be either conducted into Lake Borgne or into the Mississippi River at some point below the city.

Respectfully submitted,

HAMILTON P. JONES, M. D., Chemist Louisiana State Board of Health.

REPORT FOR SHIPPING INSPECTOR.

DR. H. A. VEAZIE.

CONDENSED REPORT SHOWING ARRIVALS OF VESSELS AT CITY OF NEW ORLEANS IN YEAR 1906.

VESSELS ARRIVING AT NEW ORLEANS IN JANUARY, FEBRUARY AND MARCH OF 1907. (Maritime Quarantine Service Transferred to U. S. Public Health and

Marine

MISSISSIPPI RIVER QUARANTINE STATION.

FINAL REPORT OF RESIDENT PHYSICIAN.

DR. JNO. N. THOMAS.

QUARANTINE, LA., Feb. 28, 1907, To the President and Members, Louisiana State Board of Health, New Orleans, La.:

Gentlemen. I have the honor to make the following report of my work at the Mississippi River Quarantine Station since your last regular meeting, together with recommendations for regulations to govern our quarantine work for the coming summer.

It will be of interest to the Board to know, prior to promulgating regulations against tropical ports for the year 1907, that there was more quarantine work done at the Mississippi River Quarantine Station during the year 1906 than ever before, and that while we had open communication with many infected ports during the entire year, and had infected vessels to arrive at this Station, no case of infectious disease was allowed to pass beyond the confines of the quarantine station. I attribute this fortunate fact entirely to the excellent quarantine regulations enforced for that year, which, while liberal to commerce, were amply protective to public health.

The total number of vessels inspected during 1906 and 1584, and of this number 556 were from infected and suspected ports and were rumigated prior to being given free pratique. Since the closing of the quarantine season on November 1, 1906, there have been 49 vessels fumigated here. Ten of these were from Cuban ports, which have been more or less infected for the past two years-reports to the contrary notwithstanding. The month of November was very warm, and the fumigations were done under orders as a precautionary measure.

The other 39 vessels that were fumigated were from ports infected with Bubonic Plague, and were fumigated to kill rats and vermin. aboard to comply with State and National regulations and right here it may not be amiss to say that National regulations are as carefully and as rigidly enforced as those of the State Board of Health of Louisiana.

I recommend that quarantine for the year 1907 go into effect not later than April 1st, and with few exceptions I trust that you will adopt, and I so recommend, the general regulations that were in effect in 1906-the exceptions I will make when the matter is up for consideration.

Yellow fever has been reported during the winter in Africa, Soutn America, Central America, Mexico and Cuba, and bearing in mind that our great epidemic in 1878, and the epidemics of 1897 and 1905, were traceable directly to Cuba, I am free to say that I now consider the Island of Cuba, especially the city of Havana, the greatest menace to the health of the Southern States, and urge that stringent regulations be adopted and enforced against Cuban ports. No half way measures will meet the case.

Very respectfully yours,

(Signed): JNO. N. THOMAS, M. D., Resident Physician...

MISSISSIPPI RIVER AND PORT EADS STATIONS.

Condensed report of vessels inspected, passed and fumigated during

(The majority of the vessels fumigated had been inspected and ordered to Quarantine by the Quarantine Inspector at Port Eads.) Mississippi River Quarantine Station

Vessels Fumigated-From Plague Ports

From Yellow Fever Ports

39 IO

REPORT OF RIGOLETS QUARANTINE STATION FOR 1906.

DR. FRED. TURNEY, RESIDENT PHYSICIAN.

To the President and Members of Louisiana State Board of Health, New Orleans, La.:

Sirs. I have the honor to report transactions at Rigolets Quarantine Station for year 1906. There arrived at station seven hundred and three (703) vessels among which there were:

There were no detentions; no quarantinable disease on board.

On September 26, during a storm that lasted three days we lost two hundred and twenty feet of wharf. Boat house and boats were saved, also all other property under my charge. The wharf was repaired or actually rebuilt and completed before end of quarantine session which ended November 1.

Respectfully submitted,

FRED TURNEY, M. D.,
Resident Physician.