be varied with good sbooo se • ftaoa for daylight on bombs containing 
i i 
moss 
antimony and loan magnesium produced a loud import and a ball of 
smoke that expanded rapidly, while for night worm the antimony was largely 
eliminated to be replaced by magnesium whioh produced a bright, startling 
flash* It was found too that e mortar 18 inches long nude of heavy gal- 
vanised iron pipe with an opening two inches in diameter gave better re- 
suits than the smaller lighter tubes, supplied by the bomb manufacturers 
as it threw the bombs much farther^, before they exploded* In addition 
• , , t • r ■ • — m' 
it waa considered safer to use as occasionally both the firing a barge and 
the bomb exploded in the mortar usually driving It deep in the mud, with 
• F • 
the heavy mortars it was possibls also to throw ths bombs with much more 
i 
aocuraoy* 
So long es the duoks were being shot at with shotguns ths bombs 
were a success and were an efficient aid In driving out the birds* Vith 
* • • 
the duo* bombs it was possibls to raise the ducks from large arses of 
i ' 
rice* Often I bad flooks laavs when bombs eers exploded at a distance 
of an eighth of n mile* 1 soon found however in areas where these was 
• • i 
no shooting that the duoJca soon became mors or lees aoouetomed te the 
' . _ ■ j- ■ ’i • — 
bombs and would not rise unless the projao tiles were exploded very near 
4 ^ . 
at hand* One night when lightening flashes oame at intervals from ston 
Nimr’ ♦ 
near the horison 1 found that the pintails paid little or no attention 
< 
to baatoft units* they foil almost among thorn* 
1 
. • 
In spite of the claims that had been made for them it was proved 
SO e _ 
that they were not successful in keeping ducks out of the rice fields where 
^ M f f f 
there was no shooting. As an adjust t0 herding with shot guns they were 
of great aid as wbsn ducks were being shot at they were much frightened 
