192 



THE WORLD'S ADVANCE 



and selling trophies. When the cargoes 

 of the blockade runners were sold at 

 auction in the harbor of Hamilton this 

 book dealer bought a number of pack- 

 age cases without the least knowledge of 

 their contents. These turned out to be 

 boxes of old brass buttons on their way 

 to the Confederate headquarters for use 

 on the uniforms of the southern soldiers. 

 This man made his fortune on these but- 

 tons which he bought so cheaply. 



A CLOCK THAT INDICATES BIRTH 

 AND DEATH RATES 



An unusual device intended to illus- 

 trate the national carelessness in the 

 matter of preventable deaths has been 

 built for the exhibit of the National 



Conference on Race Betterment at the 

 Panama-Pacific Exposition. The device 

 is a clock which, in addition to giving 

 the correct time, also gives a graphic 

 illustration of the frequency of births 

 and deaths in the United States. For 

 every birth there are four every minute 

 a white ball ascends the column at the 

 left of the. dial. For every death three 

 each minute a red or black ball de- 

 scends the columns to the right of the 

 dial. Of the "death balls," one is black 

 and two are red, indicating that two 

 out of every three deaths are due to dis- 

 eases which are preventable through 

 proper hygiene and health caution. The 

 clock is operated by electric power, two 

 small motors being concealed among the 

 works of the clock. The added functions 

 of the time-piece do not disturb the time- 

 keeping- excellence of the strange clock. 



NAVY DRY DOCK REPRODUCED 



Among the many instructive exhibits 

 in the Palace of Manufactures at the 

 Panama-Pacific Exposition is to be 

 found a very complete model of Dry 

 Dock No. 4, located at the New York 

 navy yard. This model was constructed 

 under the supervision of a corps of civil 

 engineers of the United States navy, and 

 is particularly instructive because it 

 shows the arrangement of the materials 

 and the construction of the hidden parts 

 of the dock. 



Unique Clock Which is Being Exhibited at the 



Panama-Pacific Exposition and Serves to Indicate 



the Number of Births and Deaths in the United 



States Every Minute. 



NEW FIELD FOR RADIUM 



Since great physicians began experi- 

 menting with radium as a cure for can- 

 cer, mankind has placed far greater im- 

 portance on its future and every possible 

 means is being tried to make its produc- 

 tion cheaper and easier. In view of 

 these facts, scientists are much inter- 

 ested in the announcement that Dalavit, 

 on Loch Lomondside, in Scotland, is to 

 be the home of a new radium industry. 

 John S. Mac Arthur, a noted metallurgi- 

 cal chemist, it promoting the plan, and 

 he believes the cost of the product can 

 be lessened materially. 



