THE CHINA MAIL, FEBRUARY 10,
EFFECTS OF BOMB BLAST
1941.
SERVICES IN THE DARK
In an attempt to
defeat the
black-out, which, last winter,, cut
his Sunday even-song congrega-
Bartlett,
to
CLEMENTI FAMILY
TRAGEDY
are
tions by more than a half, the A death and a wedding within 24 hours in the family of Sir Rector of Bridport, Canon Lind
Clementi Cerit is continuing
and Lady say
at the usual announced. · hold
the services time in a darkened church.
Their only son, Flying Officer Instead of following the service C. M. Clementi, has married Miss from hymn books and prayer Susan Pelham, youngest daughter Work which has been
books the congregation will be of Sir Henry and Lady Pelhain,
of Westerham, Kent. undertaken by the Re-led by lantern slides flushed on
The day before the wedding, their
Miss youngest daughter, search and Experiments screen in the chancel.
"I hope by means of the lan
died to keep my Cecily. Joyce Clementi, Department of the Ministern slide services
Prowel together and hold Park
Hospital, near congregation
try of Home Security and service at six o'clock through Basingstoke.
months," said the Sir Cecil, who lives at Holmer observation of the dam- the winter
Hymns, Canon.
anthems and Green, Bucks., is a former gov-
of
former Hong Kong, age done during air raids
prayers will all be shown on thermor
and Commander-in- have shown that the dan-screen from glass slides, and all Governor
Straits Settlements will in the church
be Chief of the hights
and former High Commissioner for the Malay States.
not
ger arising from flying extinguished. glass is considerable. While flying fragments of glass have many deaths they have
responsible for large proportion of the in- juries reported when bombs have fallen among houses, and, as Lord Wool-
caused BRITAIN CAN BEAT
been
a
ton has pointed out, for serious damage to food stocks.
Experience has proved that the blast of a bomb falling within 20011 may burst
windows
and
cause a hail of broken glass driv- ng daggerlike pieces int walls or even into tins containing food Curta n. and blinds will do
VODY
ttle to stop bying glass, though 13- they may do something
window with A brick Og up a wall on sandbagging will not save glass unless the window 15 20 empletely blocked up as to be
autight A practically
strong
black-out screen covered with building board, plywood, or thick cardboard gives good protection.
Materials stuck on glass have proved effective in preventing agments Dying, though they do not prevent windows from being broken. The cheapest and sim- plest material to use is cotton or men fabric, stuck Il Over the glass with paperhanger's paste. Net curtain materials are also very good. Brown paper works well, but it must be tough and thick.
Flying Glass
Bracing devices to strengthen windows and so reduce the chance of their breaking have been test- cd, but it has not been found that any of them gives any ap- preciable increase in the resistance of the glass to blast from borbs. Plate glass windows 3-16in. thick
• [17
rore, which are usually those and of shop fronts, restaurants, hotels, are prone to damage by blast because of their large areas, and the protection of the interior lit by the window is desirable. Small panes of plate glass are relatively strong but may fail by the frame breaking.
the
When a bomb explodes direct pressure of the blast may force in the window.
the
suction following the pressure pulse may pull it cutwards. At of preater distances reflections the chock-wave may start strong vibrations in a window which happens to have the same na. tural frequency. Such a window may break when others close by are unharmed.
The minimum distance from an explosion at which plate glass will escups domace cannot bo 200rt. its predicted. but with 'n
chance of survival : small. Be- yond that distance the chance de- pends on facts which include the size and the thickness of the pane. the frame fixing, the size of the bomb and the method of detona- tion, and, in particular, the re- Section of the blast wave from adjacent buildings. The last factor is chiefly responsible for the an- parently freakish fracture of win- dows.
When a pane breaks under se- vere blast. pieces may be scatter- ed violently. It is not possible to foretell whether the pieces will fly inwards or outwards, When apane breaks under distant blast. pieces generally fall inside and outside within a few feet
Li
It is desirable, to fasten doors
and. wide open during air raids generally to open windows,... On the general question whether win- dows which are open are less likely to be shattered than those which are closed much depends on the type of window, but as a rule the open window in less likely to suffer damage.
BOMBS
Sir Cecil M. Weir, an executive member of the Export Council of the Board of Trade, Said at Lin- through the
coin:
"We
Cannot
go
bombing experiences of the past few months without some loss of Induction in certain areas, but so far that loss has been far less than might have been supposed.
"There is
need 316)
for buyers abroad to have any doubt to make, sell about our ability and
the goods want."
deliver
our
LI
they
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