72 
PROFESSOR KOPP ON THE SPECIFIC HEAT OF SOLID BODIES. 
times, and of certain numbers which, stand in the closest connexion with these atomic 
weights. 
Berzelius’s atomic 
weights. 
Regnault’s thermal 
atomic weights. 
Usual equivalent 
weights. 
Modem 
atomic weights. 
Aluminium 
A1 = 13-7 
A1 = 13-7 
A1 = 13-7 
A1 = 27-4 
Antimony 
Sb = 61 
Sb = 61 
Sb =122 
Sb =122 
Arsenic 
As = 37-5 
As = 37-5 
As = 75 
As = 75 
Barium 
Ba = 68-5 
Ba = 68-5 
Ba = 68-5 
Ba =137 
Bismuth 
Bi =105 
Bi =105 
Bi =210 
Bi =210 
Boron 
B = 10-9 
B = 10-9 
B = 10-9 
B = 10-9 
Bromine 
Br = 40 
Br = 40 
Br = 80 
Br = 80 
Cadmium 
Cd = 56 
Cd = 56 
Cd = 56 
Cd =112 
Calcium 
Ca = 20 
Ca = 20 
Ca = 20 
Ca = 40 
Carbon 
C = 6 
C = 12 
C = 6 
C = 12 
Chlorine 
Cl = 17-75 
Cl = 17-75 
Cl = 35-5 
Cl = 35-5 
Chromium 
Cr = 26-1 
Cr = 26-1 
Cr = 26-1 
Cr = 52-2 
Cobalt 
Co = 29-4 
Co = 29-4 
Co = 29-4 
Co = 58-8 
Copper 
Cu = 31-7 
Cu = 31-7 
Cu = 31-7 
Cu = 63-4 
Fluorine 
FI = 9-5 
FI = 9-5 
FI = 19 
FI = 19 
Gold 
Au = 98-5 
Au = 98-5 
Au =197 
Au = 197 
Hydrogen 
H = 0-5 
H = 1 
H = 1 
Iodine 
I = 63-5 
I = 63-5 
I =127 
I =127 
Iridium 
Ir = 99 
Ir = 99 
Ir = 99 
It =198 
Iron 
Fe = 28 
Fe = 28 
Fe = 28 
Fe = 56 
Lead 
Pb =103-5 
Pb =103-5 
Pb =103-5 
Pb =207 
Lithium 
Li = 7 
Li = 3-5 
Li = 7 
Li = 7 
Magnesium 
Mg= 12 
Mg= 12 
Mg= 12 
Mg= 24 
Manganese 
Mn= 27-5 
Mn= 27-5 
Mn= 27-5 
Mn= 55 
Mercury 
Hg =100 
Hg = 100 
Hg = 100 
Hg=200 
Molybdenum 
Mo= 48 
Mo = 48 
Mo= 48 
Mo= 96 
Nickel 
Ni = 29-4 
Ni = 29-4 
Ni = 29-4 
Ni = 58-8 
Nitrogen 
N = 7 
N = 7 
N = 14 
N = 14 
Osmium 
Os = 99-6 
Os = 99-6 
Os = 99-6 
©s =199-2 
Oxygen 
0=8 
0=8 
© = 16 
Palladium 
Pd = 53-3 
Pd = 53-3 
Pd = 53-3 
Pd =106-6 
Phosphorus 
P = 15-5 
P = 15-5 
P = 31 
P = 31 
Platinum 
Pt = 98-7 
Pt = 98-7 
Pt = 98-7 
Pt =197-4 
Potassium 
K = 39-1 
K = 19-55 
X = 39-1 
K = 39-1 
Rhodium 
Rh= 52-2 
Rh= 52-2 
Rh = 52-2 
Rh =104-4 
Rubidium 
Rb= 85-4 
Rb= 85-4 
Rb= 85-4 
Selenium 
Se = 39-7 
Se = 39-7 
Se = 39-7 
Se = 79-4 
Silicium 
Si = 21 
Si = 14 
Si = 28 
Silver 
Ag = 108 
Ag = 54 
Ag =108 
Ag =108 
Sodium 
Na= 23 
Na = 11-5 
Na = 23 
Na = 23 
Strontium 
Sr = 43-8 
Sr = 43-8 
Sr = 43-8 
Sr = 87-6 
Sulphur 
S = 16 
S = 16 
S = 16 
S = 32 
Tellurium 
Te = 64 
Te = 64 
Te = 64 
Te =128 
Thallium 
T1 =204 
Tl =102 
Tl =204 
Tl =204 
Tin 
Sn = 59 
Sn = 59 
Sn = 59 
Sn =118 
Titanium 
Ti = 25 
Ti = 25 
Ti = 25 
Ti = 50 
Tungsten 
W = 92 
W = 92 
W = 92 
W =184 
Zinc 
Zn = 32-6 
Zn = 32-6 
Zn = 32-6 
Zn = 65-2 
Zirconium 
Zr = 33-6 
Zr = 44-8 
Zr = 89-6 
For each of the previous columns the relation of the numbers to each other is alone 
important, and not the number which is taken as unit or starting-point. Berzelius’s 
atomic weights and Regnault’s thermal atomic weights are corrected with the nearest 
