12
VICTOR L. LOOSANOFF A N D IIARRY C. D A V I S
heater. Units that combine a heater and cooler and will maintain
temperatures above or below room temperature are also available. However, when cooling devices are used it is necessary to keep the water
in cultures continuously agitated to prevent temperature stratification.
To study the effects of different temperatures e n dcvelopmeitt of
eggs and larvac of bivalves anothcr upparatus wa8 devisctl (lpig. 7).
This apparatus, which can also be used for studies of many other
forms, consists of a series of six lead-lined tanks, each 15 in wide by
FIQ. 8. Constant ternpersture sir chsrnbrn in which tray8 or othur I?oIltAbifJlm with
larval or j u v e d e mollusks are held. p%?otric? heater and fan for CirClJhhJl( L h n air
can be seen in right hang corner of unit.
Constant temperature air chambrn in which tray8 or othur I?oIltAbifJlrn with
larval or juvenile mollusks m e held. Electric? heater and fan for ~irciihitiiig L h n air
can be seen in right hang corner of unit.
Constant temperature air chambrn in which tray8 or othur I?oIltAbifJlrn with
larval or juvenile mollusks m e held. Electric? heater and fan for ~irciihitiiig L h n air
can be seen in right hang corner of unit.
26 in long and 13 in deep and f i l l r d with frwh wntm to IL ( I ~ t i w I
level. Vessels containing experirneritul animal8 &re imrnamud i r i therw,
tanks.
To mriiritain wat,er in thc tmiks at desired temperature8 each tank
is equipped, idoiig i t H walls, with l o o p of tubing to circulatc cold and
hot water. The amount of watcr paHsing through each of them tube8
is corit,rollcvi I)y dout)Ip-actiort tlic*rrrtontsts which activate Holenoid
vitlvw n o thtt if' i,1w tc~~npc~iit,rir(t i t 1 iti1.V tatik falls i)elow the thermon t ~ ~ t ,
~ ( $ 1
~itig. t l i t . ~ I b I y t ? i 1 1 thc Iiiw, tlwollgfll which hot water circulates,
opsus. allowing hot, water to flow through the loop. If, o n the other
VICTOR L. LOOSANOFF A N D IIARRY C. D A V I S
heater. Units that combine a heater and cooler and will maintain
temperatures above or below room temperature are also available. However, when cooling devices are used it is necessary to keep the water
in cultures continuously agitated to prevent temperature stratification.
To study the effects of different temperatures e n dcvelopmeitt of
eggs and larvac of bivalves anothcr upparatus wa8 devisctl (lpig. 7).
This apparatus, which can also be used for studies of many other
forms, consists of a series of six lead-lined tanks, each 15 in wide by
FIQ. 8. Constant ternpersture sir chsrnbrn in which tray8 or othur I?oIltAbifJlm with
larval or j u v e d e mollusks are held. p%?otric? heater and fan for CirClJhhJl( L h n air
can be seen in right hang corner of unit.
Constant temperature air chambrn in which tray8 or othur I?oIltAbifJlrn with
larval or juvenile mollusks m e held. Electric? heater and fan for ~irciihitiiig L h n air
can be seen in right hang corner of unit.
Constant temperature air chambrn in which tray8 or othur I?oIltAbifJlrn with
larval or juvenile mollusks m e held. Electric? heater and fan for ~irciihitiiig L h n air
can be seen in right hang corner of unit.
26 in long and 13 in deep and f i l l r d with frwh wntm to IL ( I ~ t i w I
level. Vessels containing experirneritul animal8 &re imrnamud i r i therw,
tanks.
To mriiritain wat,er in thc tmiks at desired temperature8 each tank
is equipped, idoiig i t H walls, with l o o p of tubing to circulatc cold and
hot water. The amount of watcr paHsing through each of them tube8
is corit,rollcvi I)y dout)Ip-actiort tlic*rrrtontsts which activate Holenoid
vitlvw n o thtt if' i,1w tc~~npc~iit,rir(t i t 1 iti1.V tatik falls i)elow the thermon t ~ ~ t ,
~ ( $ 1
~itig. t l i t . ~ I b I y t ? i 1 1 thc Iiiw, tlwollgfll which hot water circulates,
opsus. allowing hot, water to flow through the loop. If, o n the other