eq1=Grid[{{"SI","Gaussian"},
{"dF/dq = E + v ×B","dF/dq = E + v/c ×B"}},Frame->All]

eq2=Grid[{{"SI","Gaussian"},
{"E=D/ϵ=D/κ ϵ0","E=D/ϵ=D/κ"}},Frame->All]

eq3=Grid[{{"SI","Gaussian"},
{"B=μH=κμH","B=μH = κ H"}},Frame->All]

eq4=Grid[{{"vacuum","SI","Gaussian"},
{"permittivity","ϵ0=8.854((▫10)^(-19)) farad/m","ϵ0=1"},
{"permeability","μ0=4((π▫10)^(-7)) henry/m","μ0=1"}},Frame->All]

eq57=Grid[{{"","SI","Gaussian"},
{"polarization","P=D-ϵ0E","P=1/4π ( D=ϵ0 E}"},
{"magnetization","M=B/μ0-H","P=1/4π ((B/μ0-H)}"},
{"magn susceptivility","χm = M/H","χm=M/H"},
{"elec susceptbility","χe=P/ϵ0E","χe=P/ϵ0 E"}},Frame->All]

eq121="J=σE"
eq122="R=L/σA = lρ/A"

eq141=Grid[{{"field equations","SI","Gaussian"},
{"conservation of charge","divJ=-∂ρ/∂t","divJ=-∂ρ/∂t"},
{"Faraday's law","curlE = - ∂B/∂t","curlB = - 1/c∂B/∂t"},
{"Ampere's law","curlH = J + ∂D/∂t","curlH = 4π/c J +1/c ∂D/∂t"},
{"Gauss's law","divD = ρ","divD=4πρ"},
{"Gauss's law","divB=0","divB=0"}},Frame->All]

eq151=Grid[{{"SI","Gaussian"},
{"(OverHat[n])•(B2-B1) = 0","(OverHat[n])•(B2-B1) = 0"},
{"(OverHat[n])×(H2-H1) = K","(OverHat[n])×(H2-H1) = 4π/c K"},
{"(OverHat[n])×(E2-E1) = 0","(OverHat[n])•(E2-E1) = 0"},
{"(OverHat[n])▪(D2-D1) = σ","(OverHat[n])▪(D2-D1) = 4π σ"}},Frame->All]//TraditionalForm

eq153=Grid[{{"SI"},
{"(∇^2)Φ = ϵμ (∂^2)(∂^2) - ∂∂(divA+ϵμ∂∂)-ρ/ϵ"},
{"Gaussian"},
{"(∇^2)Φ = ϵμ/(c^2) (∂^2)(∂^2) - 1/c ∂∂(divA+ϵμ/c ∂∂)-4πρ/ϵ"}},
Frame->All]//TraditionalForm

eq154=Grid[{{"SI"},
{"(∇^2)A = ϵμ (∂^2)(∂^2) + ∇(divA+ϵμ∂∂)-μJ"},
{"Gaussian"},
{"(∇^2)A = ϵμ/(c^2) (∂^2)(∂^2) + ∇(divA+ϵμ/c ∂∂)-4πμ/c J"}},
Frame->All]//TraditionalForm

eq171=Grid[
{{"SI","Gaussian"},
{"div E=1/ϵ0 ( ρ - div P)","div E=4π/ϵ0 ( ρ - div P)"}},
Frame->All]//TraditionalForm

eq181=Grid[
{{"SI","Gaussian"},
{"curl B=μ0 ( J + curl M)","curl E=4πμ0 ( J + curl M)"}},
Frame->All]//TraditionalForm