Ah, earnings season … those few times a year when investors get to peek into the inner workings of their favorite companies and potentially see the value of their holdings explode or implode, depending on even the tiniest nuggets of news or rumors. Think of it as kind of like Christmas for investors -- sometimes you get the exact gift you want, and other times you get a lump of coal. 

And in that vein, I want to examine the earnings bill of health of four of our most esteemed industrial conglomerates.

General Electric (NYSE: GE)
The General looked pretty impressive again, producing its fifth consecutive quarter of double-digit earnings growth. The GE Capital, Healthcare, Transportation, Aviation, and Oil & Gas segments all contributed to the stellar performance. The company also grew its backlog to a record high of $189 billion. I can only really knock the company on the top line. Second-quarter revenue decreased 4% to $35.6 billion; however, excluding NBC-Universal, it grew at a 7% clip. Overall, things looked pretty impressive at GE this quarter.

3M (NYSE: MMM)
On Tuesday, Minneapolis-based 3M reported Q2 earnings per share of $1.60, up 3.9% from the same quarter a year ago. For the quarter, sales also increased 14.1% to $7.7 billion. Both organic sales growth and increased pricing power helped drive the higher figure. Better still, 3M saw revenue increasing across all geographic areas despite the Japanese disaster that eroded 2.4 percentage points of revenue growth. The company also saw sales growth across five of its six reporting segments during the period. In all, 3M's second quarter looks impressive no matter how you slice it.

Honeywell (NYSE: HON)
Honeywell's second quarter seemed largely in line with the bullish results that most industrial conglomerates produced this earnings season. For Q2, Honeywell's revenue grew 15% to $9.1 billion, which sits pleasantly at the high end of previous guidance. Meanwhile, earnings per share jumped to $1.00, a 41% increase over the same quarter last year. The company enjoyed 8% organic growth resulting from new products, emerging-market growth, and strong end markets, all helping to drive these impressive results. Perhaps most inspiring, the company raised its fiscal 2011 guidance. Management says it now believes the company should earn somewhere between $3.85 and $4.00 per share, which works out to a cool increase of between 28% and 33% from last year's figures.

Siemens (NYSE: SI)
Siemens lagged its megacap brethren in its most recent quarter, yet the company saw several positives emerge. For its third quarter, revenue rose only 2% to $25.5 billion, but there were improvements in every geographic region to help drive its growth. Perhaps a sign of better days to come, orders for the company grew at an impressive 20% clip. In part because of those new orders, Siemens' backlog reached its highest level ever, now totaling a whopping $138 billion. CEO Peter Loscher reassured investors by saying, "We continued to grow … and are on track to reach our targets for fiscal 2011."

In need of more investing ideas? The Motley Fool recently compiled a report for its readers, "5 Stocks The Motley Fool Owns -- And You Should Too," containing some of the Fool's best stock ideas. Best of all, it's absolutely free to our readers. Access your free copy now.