General Subjeets. 127 



(3) Work JUS follows: A<1<1 the 4 ozs. of ncid to the 7 ozs. of 

 wator in a saucer (mnor a«l(l the water to the acid) ; then put the 

 2 ozs. of cyanitle in small lumps wrapi^vl up in Itlnttin-^'-paiier into 

 the siuicer and close the l»in up ([uickly ; the fumes do not come t)tl' 

 for a few seconds, 8o therc neetl Ik? no dauj^er of inhalin;^ them, li" 

 fumij.jalin<» a room, put the saucer close to a door and drop the cyanide 

 into it and shut the door nipitUy ; manai^'c so that you need only put 

 your arm into the mom. 



Leave the stoivs in the fumes for two hours at legist, and then 

 open the windows from outside; ilo not go into the room for at least 

 an hour after the ilooi-s and windows have been thrown oi)en. Night- 

 time is the hest time to fumigate ; a man should keep guaixl to stop 

 people going near when either method is employed, if many people 

 are about and used to entering the room. 



If you can put the stores in bins, I should use bisulphide ; if to 

 fumigate a nx)m or store, the hydmcyanic gas. With i-easonable care 

 there is no danger in the use of either. 



GENKKAL ST I'-TKCTS 



Green Matter in Lewes Ptiblic Bath. 



To an en([uiry received by the Director from the Lewes Town 

 Council regarding the inconvenience caused by quantities of giwn 

 matter ap|>t\iring in the Public Baths, the following ivixnt was .sent : — 



The green matter sent from the ])ublic bath at liCWi-s is mainly 

 compo8cd of alj^ie — the majority arc Desmids and Diatoms — but the 

 Rlime m:i- " formed by a fjciiionostnr. There are no traces of any of 

 tht-sf in ; ijtlf of wat*r sent taken dirrc'. from the pump. 



The bottom and sides of the bath are prokablv coveretl with theAj 

 organi.sms, which increasi' with great r.ipidity ; the shmo ma.s.H«»8 formoil by 

 th<' Leui-otiost<H.' fortniiijf on tin* floor and sides of the bath, and when 

 disturlKxl by .swimmers Hoat to the surface. Tlu* green colour is due t^> 

 ccrtAin o( the "blue green" alga* conUuneil with the iK^mitLs and 

 DiaUmis in the .slime. A few protozoa and dipterous larvaMUi! 'of 

 elm, et«'.. were also prt.'sent, but th'' cause of the green floating is 



undoubtedly the alimc-forining alga; referred to. 



The remetly fouixl 8U»-«'essful in c!i«<»s of u similar nature is the 

 employment of sulphate t»f lime. Tlte l);ith should be well cleanse*! and 

 wa-^lieil out a few times with a Rtn)ng solution of the above, the sides as 

 well as the floor. 



