33 i CONTRIBUTIONT TO STUDY OF HYDROXYLAMINE. MACKAY. 



The tin electrodes, joined in the circuit, were then inserted and 

 a reading taken as quickly as possible. So slight was the 

 decomposition that the liquid solidified again in a few minutes. 

 The specific conductivity expressed in reciprocal ohms was 

 approximately 83 x 10"^. 



It thus appears that hydroxylamine has a conductivity 

 between that of liquid ammonia at 30° C, 150 x lO"*^, and that 

 of hydrazine hydrate, 34 x 10"^. On the addition of water, at 

 the concentration of ten gram molecules to ;he liter, there is a 

 specific conductivity of 310 x 10 '', which decreases continuously 

 on dilution. In the molecular conductivities there is a minimum 

 point between the concentrations 2 normal and 10 normal. 

 This may indicate that at high concentrations hydrates are 

 formed which are dissociated on further dilution. Unfortunately, 

 owing to lack of time, I was unable to further investigate this 

 anomaly. 



Freezing Points of Solid ioiis of Hydroxylamine. 



The method used for the determination of the depression of 

 the freezing point was that described by Loomis.^ 



The thermometer used was of the ordinary Beckmann type 

 and had been calibrated by the Physikalisch-Technische 

 Reichsanstalt, Berlin. It was graduated to 1/100 degree and 

 could be read directly to 1/1000 degree by means of a reading 

 microscope with a micrometer eyepiece. 



The freezing tube consisted of two parts, an inner tube with 

 re-entrant bottom, 28cm. x 2.8cm., and an outer tube providing 

 an air jacket of about 1.5mm. thickness. The inner tube was 

 supported in the outer by means of rubber bands. The ther- 

 mometer was held in po.sition in the inner tube by an ebonite 

 cover and a rubber cork a fev/ centimeters below, through both 

 of which were glass tubes to allow the stirring rod of thin glass 



1. Phys. Review, 1. 199, (1893); and 9, 257, (1899). 



