Growth of Embryos in fresh and stored Eggs. Entwicklung und Wachstum von Hühnerembryonen in frischen und in gelagerten Eiern. Dr. L. Kaufmann. Archiv für Geflügelkunde, 1938, p. 76.

Summary:

1. 1. The mortality of embryos grows with increasing length of time of egg storage before incubation, and is greatest during the first days of embryonic development.

2. 2. In stored eggs the 'water content of egg white decreases, whereas it is rising in egg yolk.

3. 3. After 1 or 2 weeks of incubation the embryos of fresh eggs are always considerably larger than those of eggs which were stored 24, 28 or 34 days.

4. 4. The percentage of water content is higher in embryos of stored eggs than in embryos developed in fresh eggs.

5. 5. The per cent. rate of growing during the second and third week of embryonic development is always higher in embryos of stored eggs than in those of fresh eggs.

6. 6. The hatch of stored eggs takes place about 1 day later than that of fresh eggs.

7. 7. In eggs stored before incubation the embryonic growing begins nearly 24 hours later than that in fresh eggs.

Shark liver Oil new source of Vitamin A for Poultry. L. L. Rusoff and N. R. Mehrhof. Gainesville, Florida Poultry Tribune, September, 1938.

Several lots of chicks were used in the experiments. One lot was fed a basal ration deficient in vitamin A. Other lots were given rations rations containing varying amounts of shark liver oil. Another lot was given a ration containing a good grade of commercial cod liver oil concentrates having at least 3,000 units of vitamin A per gramme.

Pullorum Disease. Ancora sulla diarrea bianca bacillare. V. Basso. Rivista di Avicultura, Agosto, 1938, p. 253.

Basso agrees with Sparapani and Beller that Bacillus pullorum is a parasite organism, which can only be found in weakened chickens. Writer obtained good results by adding lemon juice to their drinking water.

German Egg Laying Trials. Anon. Harper Adams Utility Poultry Journal, Vol. 21, 1936, p. 472.

The German Egg-Laying Trials are divided into two types as inEngland: (1) tests in which the individual birds are selected by the competitors themselves for entry, and (2) flock tests, the birds being selected by an officialof the agricultural association. These trials are held separately in five centres for each. A total of 1,974 birds were entered, 76·5 per cent. of the entriesbeing White Leghorns. Details of rations and production are given. Diseases of the reproductive and urinary systems accounted for 31 per cent. of the deaths. Virus diseases, including leucomyelosis (presumably lymphomatosis and Ieucaemias) accounted for 21 per cent. and digestive troubles for 16·4 per cent.