634 



TABLE 679.— IGNITION AND PROPAGATION TEMPERATURES OF DUSTS 



IN AIR* 



Degrees Centigrade 



Ignition 

 temper- 

 Dust ature 



Sugar 540 



Dextrin 540 



Starch 640 



Cocoa 620 



Flour 630 



Propa- 

 gation 

 temper- 

 ature 



805 

 940 

 1035 

 970 

 995 

 (1265) 



Propa- 

 Ignition gation 

 temper- temper- 

 Dust ature ature 



Cork 630 1000 



Rice 630 970 



Mustard 680 1050 



Wheat elevator (1295) 



Oat and corn elevator (995) 



Oat hull (1020) 



For reference, see footnote 214, p. 631. 



TABLE 680.— LOWER EXPLOSIVE LIMITS* 



Milligrams per liter of air 



Glowing 



Dust Pt wire Arc 



Starch 7.0 10.3 



Corn elevator .... 10.3 10.3 



Wheat elevator . . 10.3 10.3 



Sulfur 7.0 13.7 



Induc- 

 tion 

 spark 



13.7 

 13.7 



13.7 



Glowing 

 Dust Pt wire 



Sugar 10.3 



Aluminum 7.0 



Coal 17.2 



For reference, see footnote 214, p. 631. 



TABLE 681.— SOME MEASUREMENTS OF EXPLOSION PRESSURES* 



Pressure 

 generated, 

 Dust lb/in. 2 



Cocoa 9.9 



Sulfur flour 8.8 



Rice-bran dust ... 8.7 



Ground-cork dust. 7.4 



For reference, see footnote 214, p. 631. 



TABLE 682.— p // STABILITY RANGE OF SOME PROTEINS* 



Protein 



Amandin 



Bence-Jones . . 



Edestin 



Egg albumin . . 

 Erythrocruorin 

 Erythrocruorin 



Excelsin 



Hemocyanin . . 

 CO-hemoglobin 



Insulin 



Legumin 



Phycocyan .... 

 Serum albumin 

 Serum globulin 



Stable in the 



Source pH range of 



Almonds 4.3 to 10.0 



Pathological urine 3.5 to 7.5 



Hempseed 5.5 to 9.7 



Hens' eggs 4.0 to 9.0 



Blood of Arenicola marina 2.6 to 8.0 



Blood of Lumbricus terrestris 2.6 to 10.0 



Brazil nuts 5.5 to 10.0 



Blood of Helix pomatia 4.5 to 7.4 



Horse blood hemoglobin plus CO 6.0 to 9.05 



Beef pancreas 4.5 to 7.0 



Vetch 5.0 to 9.0 



Ceramium rubrum 1.5 to 8.0 



Horse blood 4.0 to 9.0 



Horse blood 4.0 to 8.0 



For reference, see footnote 214, p 631. 



SMITHSONIAN PHYSICAL TABLES 



