Popular Science Monthly 



203 



More Things Are Made from Yeast Than 

 Gcx)d Cooks Dream Of 



BECAUSE it is so essential in the mak- 

 ing of bread and beer most of us think 

 that yeast is useful for nothing else. 

 But the Berlin Institute of Fermentative 

 Industries calls attention to the fact that 

 valuable flavoring extracts and tonics 

 can be obtained from it and a relatively 

 large percentage of muscle-building matter. _ 

 Its remaining constituent, a mass of cellu- 

 lose, can be used to make a very hard 

 mass, known as ernolith, an excellent non- 

 inflammable substitute for celluloid. 



A Baby-Incubator Made Out Of an 

 Old Soap-Box 



ANOTHER use has been found for the 

 . time-honored soap-box, though why 

 all boxes of a certain size and shape should be 

 called soap-boxes Science itself has not as 

 yet been able to decide. At any rate Dr. 

 Alice M. Seabrooke, Superintendent of the 

 Woman's Hospital at Philadelphia, Pa., has 

 invented an incubator which can be made 

 from a box of the conventional soap-box 

 type. The model, shown in the illustra- 

 tion, was exhibited at the annual conven- 

 tion of the American Hospital Association. 



The incubator contains all the 

 features of the expensive types, 

 with arrangements for heating 

 and moistening the air and 

 for keeping the temperature 

 under control. It is pro- 

 vided with a glass top with 

 two sections. There are 

 well-protected openings on 

 all sides so that the little 

 patient can be watched 

 and attended without being 

 disturbed. 



c 



The box incubator which was constructed at a cost 

 of five dollars. Above is a photograph of Dr. Alice 

 M. Seabrooke, of Philadelphia, who invented it 



The tomato-potato plant, with tubers under- 

 ground and perfect tomatoes above. The 

 plant bore abundant crops of both products 



Growing Potatoes on the Roots 

 of a Tomato Plant 

 ONSIDERABLE interest 

 has been aroused by the 

 grafting of a tomato plant on 

 a potato plant at the Pennsyl- 

 vania State College. Al- 

 though the idea is not a new 

 one, it demonstrates clearly 

 the ease with which these two 

 closely-related plants may be 

 grafted. 

 Only one attempt was made in 

 the grafting. The common in- 

 verted "saddle graft" was used. 

 The plant was wrapped with rafiia 

 at the junction of the two pieces and 

 it was placed in a humid atmosphere for 

 several days until the union was perfected. 

 Later the plant was shifted to the outside, 

 where little attention was gi\en it. 

 Tubers finally developed on the 

 potato part and tomatoes on the top. 

 According to the authorities them- 

 selves, the demonstration is of inter- 

 est only from the standpoint of its 

 being somewhat unusual. It is of 

 doubtful economic value. 



