154 THE MENDEL JOURNAL 



twenty-eight days, there will be thirteen periods of 

 ovulation in each year. Consequently, in every 

 succeeding twelfth month, the sex of the offspring 

 will be the opposite of that in the first month. If in 

 any October a baby girl was born, then if a birth 

 should occur at the following October, the expectation 

 is that it will be a boy. The author considered the 

 date of the births of the children of various Royal 

 personages. Taking Queen Victoria's family, we 

 find that the Empress Frederick (Princess Victoria) 

 was born in November, 1840, and King Edward VII. 

 in November, 1841. In the case of the Duke of 

 Edinburgh's family, a son was born in October, 

 1874, and a daughter in October, 1875. With the 

 Duke of Connaught's family, a daughter was born 

 in January, 1882, and a son in January, 1883. The 

 family of the Tsar of Russia is interesting, since 

 there are five children. Princess Olga was born in 

 November, 1895, Princess Tatiana in June, 1897, 

 Princess Maria in June, 1899, Princess Anastasia in 

 June, 1901, and Prince Alexis in August, 1904. 



So far, these instances and many others that 

 might be quoted do support the theory, since pre- 

 diction is fulfilled by fact. But Mr. Mudge has 

 recently sent me the case of an Irish family in whicli 

 two out of six predictions are falsified. I give it in 

 a tabulated form on the next page. 



The symbols with a cross appended to them 

 indicate the cases where the prediction is not fulfilled, 

 since two daughters were born where sons were 

 expected. 



