492 Myr. Bowlker on the Lengthening of the Spark from 
of 75 mm. or 14 times the distance XA) 64 per cent. of the 
whole effect is due to the assister being detached. | 
In another case, with negative Heine distant 65 mm. from 
the positive termina! the results were :— 
Spark-gap. 
Unassisted ) -eeeeee mee 6. i.e c aes 68 mm. 
Wath \assistemmitaened... jc... .vcnenveeaee 75 
With assisten Gerelied. .....--..t..onhe ote 97 
Here 76 per cent. of the effect is due to the assister being 
detached. 
In another case, with negative assister distant 120 mm. 
from A, the results were :— 
Spark-gap. 
Lise crs rei h = cree nai. ae 75 mm. 
Wath. assmbermitached..:.. <b. shake te eee 76 
MTL, SecisserCtaChel «5 . «ss fcpeete eee eee ES 
Here nearly all the effect is due to the assister being 
detached. 
The further off the assister the greater is the part of the 
whole effect produced by detachment. 
Additional experiments showing the “ detached ” effect and 
the effect of the screen being placed near the assister point 
are as follows :— 
(a) Negative assister 100 mm. long, distant 110 mm. from the positive 
terminal. Spark-gap. 
(Tamed ts eR eee 86 mm. 
PURO APACHE... j..smys% « ate pened bay Rie Ree 9). 
PMEEeD MACHER... sss «vn ath eee 110 
Assister detached and screen near point .... 98 
(b) Negative assister distant 120 mm. 
Rieter etl yeahs hn E nfo << a eye ear eee 75 
PApeteren -AlieNeU Se vs Af...» ane ae ee 8 76 
Pssister detgcmed .)st,'. 7. 2's Gl aed eee 93 
Assister detached and screen near point .... 76 
Assister detached and screen 10 mm. from point, 88 
Assister detached and screen 20 mm. from point. 5) 
(c) Negative assister distant 65 mm. 
PBC eaten i> oka n's s Wp aig SE 68 
With detached assister (screen midway) . 97 
With detached assister (screen near point) . 86 
Here 37 per cent. of the effect is iad by howime the 
screen near the point of the assister. 
(d) With negative assister 280 mm. long at 96 mm. distance. 
Spark-gap. 
Witiaeissetiangd | sere tias occas sac ee 68 mm. 
Asiener detached ye 68.0% wads, «cae 96 
Assister detached and screen near point .... 80 
