July 20, ) 888.1 



SCIENTIFIC NEWS. 



5i 



its due service. This is the test of reality and sincerity. 

 Browning squeezes into his rhymes 



" The bee with his comb, 

 The mouse at her dray " 



(It should be the squirrel), 



" The grub in its tomb, 

 Wile winter away ; 



But the fire-fly, and hedge-shrew, and lob-worm, I pray, 

 How fare they ? " 



The bee, and the grub, and the lob-worm do nothing 

 for the poet at least. But what desolation is added to 



AIR PROPELLER.— II. 



we described this very useful 



THE BLACKMAN 

 TN our last number 



apparatus, and mentioned that, besides being suitable 

 for ventilation, it is largely used in many industries for 

 drying purposes. In the accompanying figures we illus- 

 trate some very successful applications of the propeller. 

 Fig. 2 represents the rag-cutting room of a paper mill, 

 where the dust is not only very inconvenient but injurious. 

 By means of a propeller, which causes upward currents 

 of air through gratings in the floor, in the direction ot 

 the arrows, the dust is now completely removed from 



Fig. 2. — Air Propeller RemovingDust from a Rag-Cutting Room jn a Paper Mill. 



the cutting-room, and is all discharged into an adjoining 

 settling room, where the bulk of it is collected. 



In Fig. 3 we give a longitudinal section of a steam 

 laundry where one air propeller is used for three differ- 

 ent purposes. It will be seen that the propeller is fixed 

 between the drying room and the washing room. The 

 air inlets are in the ironing room, and between the latter 



Aylmer's Field by the shy creatures which come back to 

 their ancient haunts, after the wilful lord has undone the 

 last of his race : 



"The hedgehog underneath the plantain bores, 

 The rabbit fondles his own harmless face, 

 The slow-worm creeps, and the thin weasel there 

 Follows the mouse, and all is open field." 



^1 



= DRYING ROOM. - 



WASHING^BOOM. 





Fig. 3. — Air Propeller used for Cooling, Drying, and Ventilating in a Steam Laundry. 



The Dog Nuisance in Paris. — Rabid dogs are said 

 to be extremely prevalent at present in Paris, and the 

 authorities are at last taking stringent measures. A 

 medical contemporary remarks that the Pasteur Insti- 

 tute ought to be most abundantly supplied with cases 

 for treatment. 



and the upper drying room, and again between the 

 upper and lower drying rooms there are openings in 

 which are placed coils of piping, heated by steam. The 

 outlet is at the end of the washing room, farthest from 

 the propeller. When the latter is in operation fresh air 

 is drawn through the ironing room, which is agreeably 



