1922. ] Indian Science Congress. I.8.C. 173 
0 ae of H nuclii with 2 — electrons to make an a particle. is ex- 
mely rs ble. 
a experiments Se Ripert for heavy wpe like gold show that 
the nuclii behave as s down to distances of 3x 10-!2 ems. whereas 
oa 16 sa experiments inlionte that 1 the law fails td hold down to 3x 10-15 
hus begin to get some distortion of the nuclii Sian by the 
silted aa when they approach to peas in this latter distance of each 
other.. The sombre: value of the pulsive << betwen two nuclii 
ona close 8 oc seit g f this kind is 5 ki ilo ograms w 
cent discoveries maa ead from ale experiments on the 
sap 
sbsorption of the propelled oo atoms by gases. 
columns of Oxygen CO, were val the absorption followed 
the u Satta. When however dried air was used the number of scintil- 
bitions. increased instead of diininishin 
Now a particles in Oxygen and Nitro gen give rise to atoms of r 
9 ems. in air and are » Brohaae wift Oxygen or Nitrogen — carrying 
Soa charge and produced by collisions. Therefore in the experiments 
w being described only those — were dealt with which were pro- 
pelled ~~ ranges & greater than 9c 
change in the phenomenon when chemically prepared Nitrogen _ sub- 
sibated. a air. As they were not produced in Oxygen it was n 
to attribute price to Nit rogen. But Nit ee atoms have sie a ; se 
of 9 cms., new particles cannot be Nitr itself. 
The value of their mass and velocity was gg ined by the deflec- 
Hydrogen. Further ec oe of the de rept oh known ae cw 
atoms with ree new atoms amply confirmed t 
before mass ng the ey 
addition to te. ge range atoms from Nitrogen with whic as 
hav eas dealt there are produced gto of pleted range but sti 
greater ag that of the a particle which pr 
is strong experimental evidence for meee’ these oye range 
a * 
atoms ll Nitrogen and also from aS. SS codes 
r sce ituent of the nuclii of 
erase 
isotope of 
: Cua: onsets of ong Nitrogen and a Oxvem cos 
Suggested by Rutherford as sult of these rece 7 d that 
R d "Og give rise to atoms of mass 3 an 
oy N ae rise to H is four atoms of mass 
